Author name: Marlon Keene

Marlon Keene is a 27-year-old American content creator living in Spokane, Washington. Passionate about evidence-based fitness education, he has built experience writing accessible guides for beginners and experienced athletes alike. As an author for muscleprogress.xyz, he combines careful fact-checking with engaging storytelling to produce reliable articles that help readers improve their fitness knowledge and confidence.

How Many Crunches a Day to Get Abs Results

How Many Crunches a Day to Get Abs Results and Improve Core Strength

Walk into almost any gym, scroll through social media, or watch a fitness advertisement, and you’ll probably hear the same message: do enough crunches and you’ll get a six-pack. It sounds simple. If abs are muscles, then training them more should make them visible, right? The reality is much more complicated than that. While crunches […]

What Is a Good Leg Press Weight for Beginners

What Is a Good Leg Press Weight for Beginners and How to Start Safely

The leg press machine is one of the most popular pieces of equipment in any gym, and for good reason. It allows beginners to train the major muscles of the lower body; including the quadriceps, glutes, hamstrings, and calves; without needing the balance and coordination required for exercises like barbell squats. Because the machine guides

What Muscles Does the Lat Pulldown Work in Training

What Muscles Does the Lat Pulldown Work in Training for Strength

The lat pulldown has earned its place as one of the most popular back exercises in gyms around the world. Whether someone is a beginner learning basic pulling mechanics or an experienced lifter chasing a wider back, the lat pulldown offers a controlled and highly effective way to train the upper body. Unlike pull-ups, which

How Long Should You Work Out for to Build Muscle

How Long Should You Work Out for to Build Muscle and See Steady Progress

Recent research continues to challenge the old belief that longer workouts automatically produce more muscle growth. Studies examining hypertrophy, rest intervals, and training volume suggest that workout quality, effective sets, recovery, and consistency matter more than simply spending extra time in the gym. Research also indicates that longer rest periods of over 60 seconds may

How to Know If Abs Are Forming Properly

How to Know If Abs Are Forming Properly During Your Fitness Journey

Most people begin their fitness journey with one clear image in mind: a defined set of abs. The challenge is that abdominal development rarely follows the timeline people expect. Many individuals spend weeks training consistently and assume nothing is happening simply because they cannot see a six-pack in the mirror. The truth is that visible

How Many Grams of Protein Are in a Whole Chicken

How Many Grams of Protein Are in a Whole Chicken and What Affects the Total

Chicken has earned its reputation as one of the world’s most popular protein sources for a good reason. Whether you’re trying to build muscle, lose weight, maintain a healthy body composition, or simply eat a balanced diet, chicken offers a remarkable combination of high-quality protein, affordability, and versatility. Unlike many plant-based protein sources, chicken contains

What Is the Difference Between Muscular Strength and Muscular Endurance

What Is the Difference Between Muscular Strength and Muscular Endurance in Exercise

Walk into any gym, and you’ll hear people talking about getting stronger, building stamina, lifting heavier, or lasting longer during workouts. At first glance, these goals may sound almost identical, but they actually revolve around two completely different concepts: muscular strength and muscular endurance. Understanding the distinction between the two can completely change how you

How Many Calories Does 100 Kettlebell Swings Burn

How Many Calories Does 100 Kettlebell Swings Burn Based on Effort Level

Kettlebell swings have earned a reputation as one of the most efficient exercises in fitness. They combine strength training, cardiovascular conditioning, explosive power, and muscular endurance into a single movement. That’s why many people wonder: how many calories does 100 kettlebell swings burn?The answer isn’t as straightforward as many fitness trackers would have you believe.

How to Drink Protein Shakes for Weight Loss Goals

How to Drink Protein Shakes for Weight Loss Goals the Right Way

Many people assume that protein shakes directly burn fat, but that’s not how weight loss works. Fat loss happens when you consistently consume fewer calories than you burn. Protein becomes valuable because it helps preserve lean muscle mass while you’re eating in a calorie deficit. When muscle is maintained, your metabolism generally remains more active,

Why Do Your Legs Shake on Leg Extensions

Why Do Your Legs Shake on Leg Extensions During a Workout

Recent exercise science research shows that muscle shaking during resistance exercises is most commonly linked to neuromuscular fatigue, increased motor unit recruitment, and reduced force control as muscles tire. Studies examining knee extensors and quadriceps muscles have found that force fluctuations increase during fatigue and that the nervous system recruits additional motor units to maintain

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