Muscle & Performance

Questions to explore

• Does Hybrid Training Really Build Muscle and Endurance at the Same Time? — MODERATE. Concurrent resistance and endurance training can improve aerobic fitness alongside muscle size and strength in recreational adults.
• Do Under-Desk Exercise Bikes Really Improve Your Health? — LIMITED. Under-desk cycling improves short-term metabolic measures compared with uninterrupted sitting.
• How Accurate Are DEXA Scans for Measuring Body Fat? — WEAK. DXA can help track body composition, but body-fat estimates are not exact and lean soft tissue is not a direct measure of skeletal muscle.
• Does Tart Cherry Juice Really Speed Up Muscle Recovery? — LIMITED. Selected recovery signals are encouraging, but soreness and functional recovery findings differ across studies.
• Can You Really Build Muscle and Lose Fat at the Same Time? — MODERATE. Simultaneous fat loss and gains in measured lean mass can occur under suitable training and nutrition conditions.
• Does Training Six Days a Week Build More Muscle Than Three? — MODERATE. Six gym days are not automatically better for muscle growth when weekly training volume is matched. More days can help distribute work, and strength may respond differently. Three days is not universally superior either.
• Can Training Your Grip Strength Really Help You Live Longer? — WEAK. Lower grip strength is consistently associated with higher mortality risk. That does not demonstrate that grip-specific training extends life. Improving a predictor is not automatically the same as changing the outcome it predicts.
• Do Cluster Sets Really Build More Strength and Muscle? — WEAK. Cluster sets can reduce fatigue and help preserve repetition speed. They are a useful training option, but long-term research does not establish a general advantage for muscle growth or maximal strength over traditional sets.