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 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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