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Fast-Twitch vs Slow-Twitch Fibres: Training for Each

Muscle fibres don’t come in a single type. Instead, they come with a mix of slow-twitch and fast-twitch fibres. Both types of fibres are useful for different types of activities. Some help you to last for a long time, while the other type helps you to generate sudden forces. Learning about the types of muscle fibres can help you become a good athlete or a fitness enthusiast. Once you learn about the type of fibres you are working with, you can easily create a routine that meets your training requirements. What is Twitch in Muscle? A twitch is a sudden contraction followed by a sudden release of the muscle fibres due to a nerve signal. Every movement you make, whether you walk or lift weights, occurs due to thousands of twitches.

Muscle Fibres Come in Two Types. 

FeatureSlow-Twitch Fibres (Type I)Fast-Twitch Fibres (Type II)
FunctionThese fibres are designed for endurance and sustained activity.These fibres are built for power and explosive movements.
Contraction speedContract slowlyContract quickly
Fatigue resistanceHighly resistant to fatigueFatigue more quickly
Energy useUse oxygen efficiently for long-duration activityUse energy rapidly for short bursts of effort
Force productionProduce a lower force but can sustain it longerProduce higher force and power
Common activitiesLong-distance running, cycling, swimming, and steady moderate-intensity workoutsSprinting, heavy weightlifting, jumping, and high-intensity interval training
Structural traitsContain more mitochondria and capillaries, which help deliver oxygen and support long-term energy productionGenerate greater power, but cannot sustain activity for long periods

Training for slow-twitch muscles typically emphasises endurance. Examples of training methods:

  • Long cardio training
  • Increased repetitions for strength training
  • Reduced resting periods between sets for strength training
  • Moderate-intensity endurance training
  • Strength-training repetitions for this type of training may be between 12 and 20 per set, using lighter weights.

    This type of training helps to develop the following: • Muscular endurance • Oxygen usage • Fatigue resistance. This type of training is usually a priority for endurance sport athletes.

    Training for Fast-Twitch Fibres

    Fast-twitch muscles usually respond to high-intensity training. Examples of training methods for this type of training:

    • Heavy strength training
    • Sprint intervals
    • Plyometric training
    • Olympic lifting training
    • Strength training repetitions for this type of training usually range from 1 to 6 per set with heavy weights.

      This type of training helps to develop the following: • Strength • Power output • Explosive speed. Athletes who take part in sprinting events, powerlifting, football, etc., usually focus on the development of fast-twitch muscles.

      Muscle Twitching Causes

      Muscle twitches may also occur in small amounts, even in the absence of exercise. Common reasons for muscle twitches are:

      • Muscle fatigue after a strenuous workout
      • Stress and anxiety
      • Dehydration
      • Electrolyte imbalance (low levels of magnesium and potassium)
      • Consuming too much caffeine
      • Sleep deprivation

        Muscle twitches tend to resolve on their own as your body recovers from these factors.

        Muscle Fasciculation Causes

        Muscle Fasciculation Causes

        A fasciculation in a muscle is a small visible muscle movement under the skin, caused by spontaneous muscle fibre contraction. Reasons why fasciculations happen include:

        • Post-exercise muscle fatigue
        • Irritation of nerves
        • Electrolyte imbalance
        • High stress levels
        • Overtraining

          Most fasciculations are harmless; however, in some instances where muscle twitches are increasing in severity, it is a good idea to seek medical help.

          Read Also: Muscle Cramp Prevention in High-intensity or Long-Duration Training

          Takeaway

          Slow-twitch and fast-twitch muscle fibres have different functions that contribute to physical performance. Slow-twitch fibres contribute to endurance activities, whereas fast-twitch fibres contribute to explosive power. Most training regimens will include both fibre types to a certain degree. However, training intensity, load, and style can be altered to emphasise one over the other. Knowledge of the differences between the two will allow athletes to train more effectively to meet their performance goals.

          While you address this concern, for all your gym supplements, we offer MuscleBlaze as a trusted source of creatine.

          Why Cheap Protein Is Expensive in the Long Run

          Hi Ziddis! Protein powders are the most bought gym supplement. A cheaper protein powder, for instance, may seem like the best bargain in the world. The container of the product is affordable, and the product contains 24 grams of protein, just like the other products out there. However, a product’s price does not always tell the whole story. The truth of the matter is, cheaper protein powder products may actually turn out to be more costly in the long run. 

          Knowing the difference between price and value will help you make the right choice for your protein powder.

          Protein Powder Price vs Quality

          Not all protein powder is created equally, and two containers, although similar in appearance, may vary in quality, purity, and testing protocols.

          How can cheaper proteins be cheaper

          Here are a few ways in which cheaper proteins are, well, cheaper.

          ProductPriceScoop SizeProteinActual Protein Percentage
          Brand ARs. 1500/500 g35 g24 g~69%
          Brand BRs. 1200/500 g35 g18 g~51%

          You can see how, when the pricing is lower, the actual protein percentage also reduces. This is often ignored.

          More Protein Per Serving

          Some proteins are cheaper because the serving size is larger, but the amount of protein is actually lower. This product may look cheaper in the container, and in a sense, it is, because you are getting a lot less protein per scoop. The consequence is that you will be forced to consume more scoops to make up for the amount you need on a daily basis.

          More Fillers and Additives

          Cheaper proteins may contain additives that make the scoop heavier, even though there is no more protein in the scoop.

          • Maltodextrin
          • Thickening agents
          • More flavourings
          • More sugar

          Cheaper Filtration Processes

          Whey proteins, in particular, are filtered in several ways to eliminate unwanted fats, lactose, and other impurities.

          Cheap Protein Powder Risks

          Buying a cheap protein powder can cause a number of hidden problems.

          Amino Spiking

          One of the biggest problems in the supplement world is amino spiking. Companies are adding cheaper amino acids to their products to increase their protein content.

          These amino acids are included in protein tests but do not offer the same muscle-building benefits as a complete protein.

          The result is a product that claims to have 24 grams of protein but actually contains much less.

          Poor Digestion

          Poorly filtered or additive-ridden protein can also cause stomach problems. Some of the common complaints include:

          1. Bloated stomach
          2. Gas
          3. Cramping in the stomach
          4. Difficulty digesting lactose

          These problems can occur when a company does not filter their product correctly or when unnecessary ingredients are added.

          If stomach problems occur, people may either reduce their intake or stop using the product altogether. This means a cheap product is essentially flushed down the toilet.

          Lack of Testing and Quality Control

          Testing is one of the biggest differences between a premium product and a cheaper alternative.

          Companies that test their products check for several factors, including:

          1. Accurate labeling
          2. Contaminants
          3. Heavy metals
          4. Purity of ingredients

          Cheap protein powders sometimes skip this step to reduce manufacturing costs. This means consumers must rely entirely on what the label claims.

          Without testing, there is no strong guarantee that the numbers on the label are accurate.

          Hidden Costs That Add Up

          Despite the fact that the initial price may be low, cheap protein supplements can cause you to incur costs in the long run.

          Wasted Servings

          If a supplement contains less protein content than indicated on the label, you may find yourself using more scoops to ensure you are getting enough protein in your diet.

          This means you are using up your supplement earlier than you should.

          Slower Progress

          Muscle repair and recovery are important for building muscle mass. When you are getting less protein in your supplements than you should, you may find that you are not progressing in the gym as you should.

          This means you may take a long time to achieve your fitness goals.

          Loss of Trust

          Once you suspect that you are not getting accurate information from a supplement label, you may find that you cannot trust that particular supplement brand again.

          Evaluating Protein Powder Quality

          Instead of focusing only on price, it helps to evaluate protein powder based on value.

          Here is a simple checklist.

          FactorWhat to Look For
          Protein per scoopAround 20–25 g per serving
          Protein percentageIdeally, above 70% of the scoop weight
          Ingredient transparencyNo proprietary blends
          Amino profileNo added glycine or taurine
          TestingThird-party testing or certification
          DigestibilityMinimal additives and good filtration

          Looking at these factors helps determine whether a protein powder is genuinely high quality.

          Read Also: A Guide to Supplement Safety

          Takeaway

          Though cheap protein powder may look good because of its price tags, if we talk about amino spiking, inaccurate labelling, reduced protein content, and digestive issues, it is not as cheap as it is made out to be. Sometimes, a protein powder that is a bit more expensive and has accurate labelling, proper filtration, and reliable tests is better. Rather than saying, “Which protein powder is cheap?” a better and more appropriate question would be, “Which protein powder delivers the most protein, has the best digestion, and has the highest quality?” Choosing a protein powder, fit foods or even multivitamins this way will not only protect your progress but also protect your wallet.

          The Heavy Metal Concert You Didn’t Invite: A Guide to Supplement Safety

          When you think of heavy metal, you’d think distorted guitars and loud drums. All true but in the world of supplements heavy metals are not really cool. We are talking about elements which make your supplements dangerous like lead, mercury and arsenic. They are the uninvited guests, who could crash your fitness party. Understanding heavy metal testing is not just about scaring you away from your daily multivitamin, it is to make sure you are choosing right. 

          Heavy Metals in Supplements

          Heavy metals are metallic elements with high densities that are toxic even when consumed at minuscule quantities. Unlike the vitamins, which you take intentionally, these aren’t nutrients, they are environmental bystanders. How do they get in your protein powder or herbal capsules? 

          • Through Soil: Plants used to make your herbal supplements could absorb minerals from earth and sometimes these come along if the soil is contaminated. 
          • Manufacturing: Older machinery or low-quality processing units can cause minerals to find their way into your supplements, maybe during the grinding or encapsulating process. 
          • Water: If a supplement requires water during extraction and that water is not properly filtered, you could have a problem. 

            The Four Usual Suspects

            In the lab, the technicians who ensure the safety of your supplements usually look for:

            • Lead: Found in root-based herbs 
            • Arsenic: Found in rice-based products or sea-derived supplements
            • Mercury: Found in fish oils and marine collagen
            • Cadmium: Found in leafy greens and cocoa

              Why Heavy Metal Testing Matters

              While the human body is resilient and has a safe-guarding system of its own, a lot of elements have the potential to enter it and cause havoc. This can build up in your tissues in the long run. Why heavy metal testing matters is simple:

              • Taking a single pill with a trace amount of heavy metals might not be lethal but taking it every morning for years can cause symptoms to build up and cause deadly repercussions.
              • Testing ensures that your daily dose of wellness is giving you only wellness and none of the deadly stuff.
              • Testing makes sure your supplements do not have a bad impact on your kidney, nervous system or hormone balance. 

                Heavy Metal Testing Supplements

                Heavy Metal Testing Supplements

                When you think of testing you might imagine a person with magnifying glass skimming through your supplement powders like whey protein looking for metal traces. That is great imagination but because of the advancements in science, we have high-end labs to use a process called ICP-MS. 

                Safe limits are already determined for these heavy metals by authorities like FDA, NSF or EPA. 

                When testing the heavy metals, supplement companies go for:

                • Third-Party Testing: Independent, certified labs, not just the brand’s own lab and “trust me” department.
                • The Certificate of Analysis: This document lists the exact levels of metals found in the specific batch

                  Read Also: How to Read a Protein Label in 30 Seconds

                  Takeaway

                  Heavy metals are a natural part of the environment but need not be a part of your daily supplement routine. Always check for the lab tested supplements and ensure that the heavy metal levels are to minimum. Even your fit foods and peanut butter is checked for heavy metals so make sure next time you are buying something for your fitness goals, they are checked and verified. 

                  The Most Common Beginner Mistakes in Protein Intake

                  Hello Ziddis! The journey towards better health often begins with a realization that your body is constantly under construction. And what does it need when it needs to build? Bricks! The proteins. Every day, protein repairs, replaces and creates for your body. The obsession with protein intake is not just a fitness fad. It is a realization that by having more protein, your body can build to be stronger. But how do you know you are having protein the right way? True wisdom in nutrition lies in understanding balance and sustainability over raw numbers.

                  The Subtle Art of Protein

                  One of the most common mistakes one commits is viewing protein as only a source for muscle gain. The truth is that protein is the most expensive macronutrient for your body to process. This means that your body needs more energy to digest protein than it does to digest carbs of fats. This way, it can signal your brain that you are full. When you neglect protein, you are missing out on muscle. 

                  What are some common pitfalls you need to avoid?

                  • Backloading: By not dividing your protein intake throughout the meals, you end up trying to cram most of it in the last meal. 
                  • Over supplementation: Supplements are great and most often the best source of protein intake, but they lack the qualities and other components that food can give. 
                  • Ignoring bioavailability: Not all proteins are created equal. While 20 grams of protein from a steck and the same for a slice of bread may look the same on label but are not when it comes to your body absorbing it. 

                    Protein Intake Calculator

                    To find your baseline, you must look are your biological demand. If you have a desk job your demands would be different than someone who runs marathons and even different from someone who does ground work. What would work best is if you calculate your need based on your total body weight. Simply follow this fomula:

                    To maintain your body weight and muscle mass: 1.2 grams of protein per each kg of your body weight. For example: If your body weight is 75kg, you will need to have 75 X 1.2 grams of protein = 90 grams of protein every day.

                    If you want to build an athletic built or have an active lifestyle, have 1.6 grams of protein per kg of your body weight. For example:  If your body weight is 75kg, you will need to have 75 X 1.6 grams of protein = 120 grams of protein every day.

                    Protein Calculator for Weight Loss

                    When you are following a calorie deficit diet, protein is an asset. When the body is short on energy, it becomes catabolic which means it may begin to break down its own muscle tissue for fuel. High protein intake acts as a shield, signalling your body to burn stored fats and spare the lean muscles.

                    GoalThe Wisdom Behind It
                    Fat Loss1.8 grams to 2.4 grams per kg of your body weightHigher intake preserves metabolic rate and suppresses the hunger hormone, Ghrelin.
                    Body Recomposition1.6 grams to 2 grams per kg of your body weightProvides enough building blocks to lose fat and gain slight muscle simultaneously.

                    How Much Protein to Build Muscle

                    Muscle protein synthesis aka MPS is the process of repairing and growing muscle tissue. To keep this process going, there needs to be a threshold of  roughly 25 grams to 40 grams of high-quality protein per meal. For muscle growth, your total daily target should be around 1.6 grams to 2.2 grams  per kg. Beyond this point, your body simply oxidizes the extra protein for energy rather than using it for repair.

                    How to Increase Protein Intake

                    How to Increase Protein Intake

                    Muscle building starts in the kitchen. It is about friction reduction between your nutrition and food. If you think it is tough to streamline it, you might already be consuming some high protein foods you might already be consuming.

                    • First meal aka breakfast, is important and never to skip it. Break the fast with 30 grams of protein.
                    • Upgrade your staples: Instead of white rice, opt for quinoa, instead of sour cream go for greek yogurt.
                    • Sides: Get into the habit of carrying a protein snack around like protein bar.

                      A Basic Daily Protein Routine (130 grams protein target)

                      • 8:00 AM: 3 eggs + 1/2 cup cottage cheese or black beans (30g)
                      • 12:30 PM: Large salad with 5oz grilled chicken or tempeh (35g)
                      • 4:00 PM: A handful of almonds and a small Greek yogurt (20g)
                      • 7:30 PM: 6oz white fish or lean beef with roasted vegetables (40g)
                      • Optional: A slow-digesting casein shake or milk before bed to support overnight repair.

                      Read Also: Are You Overestimating Your Protein Intake? How to Calculate It Accurately

                      Takeaway

                      While protein is the most important element of your meal, you can think of protein intake as a game to collect your protein points by the end of the day. Adding some fun to it can help. By spreading across your protein needs throughout the day, you can end up completing your protein intake goal easily. Look beyond cutting carbs and start adding proteins. Gym supplements such as creatine also require good protein backing. So protein up for your fitness routine!

                      DOMS Explained: Why You Get Sore and What Helps

                      Hello Ziddis! Have you felt great after working out and then suddenly a soreness sets in that occurs hours after a workout is what most people refer to as “workout soreness,” but it is more accurately known as DOMS, or Delayed Onset Muscle Soreness. DOMS is not arbitrary. It is not a sign of weakness. And, no, it is not an indicator of a “good” workout. DOMS is merely your body adapting to physical stress. Understanding what DOMS is and how to deal with it can be a game changer for your routine.

                      What is DOMS?

                      DOMS is an acronym that stands for Delayed Onset Muscle Soreness, and it typically occurs 12 to 72 hours post-exercise. DOMS is not the pain you feel during exercise, but rather the soreness that develops after the fact.

                      Delayed Onset Muscle Soreness typically occurs when you:

                      • Go back to training after a period of inactivity
                      • Learn new exercises
                      • Add more volume to your training
                      • Add more intensity to your training
                      • Change your training style
                      • Learn new movement patterns

                        DOMS is not an injury and is not indicative of damage in a negative way. DOMS is actually a natural response to exercise.

                        Sore Muscles After Workout

                        DOMS is an acronym that stands for Delayed Onset Muscle Soreness, and it typically occurs 12 to 72 hours post-exercise. DOMS is not the pain you feel during exercise, but rather the soreness that develops after the fact.

                        Delayed Onset Muscle Soreness typically occurs when you:

                        • Go back to training after a period of inactivity
                        • Learn new exercises
                        • Add more volume to your training
                        • Add more intensity to  your training
                        • Change your training style
                        • Learn new movement patterns

                          Delayed Onset Muscle Soreness is not an injury and is not indicative of damage in a negative way. DOMS is actually a natural response to exercise.

                          Onset Muscle Soreness

                          This is one of the most harmful fitness myths: “soreness is a measure of workout quality” What soreness reflects is tissue inflammation, unaccustomed stress, and new movement patterns, but it does not reflect muscle growth, strength gain, or training effectiveness. Progress, quality, and fitness improvement are important too.

                          DOMS Treatment

                          There is no magic solution for an actual recovery, which is easy and physiological.

                          • Sleep is the most effective recovery method. Lack of sleep directly impacts recovery and delays soreness.
                          • Hydration helps with blood circulation, nutrient supply, and waste removal. Dehydration worsens stiffness and inflammation, making DOMS worse and recovery take longer.
                          • Protein consumption helps supply materials for muscle repair. 
                          • Light physical activity is better than complete rest. 
                          • The more you train, the more adaptable your muscles will be. 

                            But what does not help with DOMS is:

                            • Relying on painkillers
                            • Random recovery supplements
                            • Ice baths are not helpful for chronic use
                            • Foam rolling

                              Read Also: What’s the Science Behind Delayed-Onset Muscle Soreness (DOMS)?

                              Takeaway

                              Reducing DOMS in the long run is achieved through effective training, not tricks. Progress incrementally rather than shocking your system with abrupt volume or intensity increments. Warm up thoroughly to precondition your tissues to the stress. Train regularly rather than erratically. Control training volume rather than seeking exhaustion. Recovery is part of progress. To support your fitness journey, you can start with a proteinous diet which includes fit foods and oats protein

                              Cutting vs Recomp: What Works Better for Most People

                              Hi Ziddis! If your goal is to look leaner, fitter and more confident in your body, you have probably come across two popular strategies: cutting and body recomposition, aka recomp. They are both widely used in fitness culture. Both can work, and both are often misunderstood. The real issue isn’t which method is better. The real issue is choosing the wrong approach for your body, lifestyle and mindset. What works brilliantly for one person can completely fail for another.

                              Cutting vs Recomp

                              Let us break down cutting and recomp in a practical, realistic way, so you can choose a strategy that actually fits your life, not just your goals.

                              CuttingBody Recomp
                              Cutting is an approach one takes for fatlossBody recomp focuses on building lean muscle and the fatloss comes as a result of muscle building
                              You go on a calorie-deficient diet wherein you eat fewer calories than you burnProtein intake is higher, and the focus shifts from calorie counting to protein counting, which is required for building muscle.
                              You end up losing fat while you train to preserve as much muscle as possibleThe results are not measured on scale but in your body structure, strength and stamina
                              The approach is simple, direct and result-drivenIt is a slower but more effective approach
                              You must be disciplined, consistent and tolerant of short-term restrictionsIt is a more sustainable approach and requires long-term effort

                              Bulk Cut vs Recomp

                              The classic fitness culture will typically include bulk and cut cycles:

                              • Bulk to gain muscle (and some fat)
                              • Cut to burn fat while preserving muscle

                                This is very effective for advanced weightlifters, athletes, and people who take their fitness seriously and track everything down to the exact detail. However, for the average person, this is hard to maintain from a psychological and emotional standpoint.

                                Recomp, on the other hand, is more moderate. There is no extreme bulk and no extreme cut. The gains are slower, but the lifestyle is easier to maintain.

                                For most people with busy lives, stress, and irregular schedules:

                                • Cutting is faster physically
                                • Recomp is easier psychologically

                                  Lean Bulk vs Body Recomp

                                  A lean bulk is a small calorie surplus that is used for muscle gain with a small amount of fat. It is most suitable for individuals who are already lean, train regularly, and are comfortable with gaining some fat.

                                  Recomp is most suitable for individuals who are:

                                  • New to training
                                  • Returning to training after a long period of inactivity
                                  • Carrying moderate to high levels of body fat
                                  • Inconsistent with their training
                                  • Highly sensitive to training stimulus

                                  For such individuals, merely lifting weights, consuming adequate protein, and training regularly will help them lose fat and gain muscle without having to go to extremes.

                                  Recomp vs Cutting Diet

                                  Recomp vs Cutting Diet

                                  Let us understand how recomp is different from cutting the diet

                                  AspectCutting DietRecomp (Body Recomposition)
                                  Core GoalFat loss firstFat loss + muscle gain together
                                  CaloriesCalorie deficit (10–25%)Around maintenance
                                  Protein IntakeHigh protein intakeHigh protein intake
                                  Training PrincipleStrength training is non-negotiableProgressive resistance training
                                  CardioSupports fat loss, doesn’t replace trainingOptional support, not a driver
                                  Lifestyle FocusDiscipline & structureConsistency & sustainability
                                  Recovery FocusSleep and stress management are criticalLong-term consistency matters
                                  MindsetResults-drivenHabit-driven
                                  Common MistakesExtreme deficits, low protein, only cardio, crash dieting, muscle loss, unrealistic timelinesNo progression, under-eating protein, scale obsession, inconsistency, quitting early, impatience
                                  TimelinesVisible fat loss: 3–6 weeksMajor transformation: 8–16 weeksVisible changes: 6–12 weeksClear body shape change: 3–6 months
                                  Scale ChangesClear dropMinimal change
                                  SustainabilityMediumHigh

                                  Read Also: Body Recomposition: Everything You Need to Know

                                  Takeaway

                                  There is no better approach, only the approach you can realistically follow. Cutting will change your body quicker. Recomp will change your habits more easily. Most people don’t fail because they pick poor strategies; they fail because they pick strategies that don’t fit their reality. The best strategy is the one that fits your body, lifestyle, mindset, and patience level. Time to buckle up with activewear like comfy tank tops.