Research
Cellular
Muscle strength increased after all training interventions: RET by +25% ± 5%, HIIT by +10% ± 5%, and endurance training (ENT) by +7% ± 7% (P < 0.05).
All forms of exercise training can enhance muscle strength in middle-aged men.
StrongSupportsmedium confidence
Muscle strength (sum of leg press, leg extension, and bench press one-repetition maximums) increased after all training interventions (RET, +25% ± 5%; HIIT, +10% ± 5%; ENT, +7% ± 7%; P < 0.05).
Why this rating
Based on randomized controlled trial design.
Source
Skeletal Muscle Adaptive Responses to Different Types of Short-Term Exercise Training and Detraining in Middle-Age Men
Marcus J. Callahan et al. · Medicine & Science in Sports & Exercise · 2021
DOI 10.1249/mss.0000000000002684
rct · n=35Cited 23×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
Related findings · Cellular
- Athletes aiming to reduce fat mass and preserve FFM should consume protein intakes in the range of ∼1.8-2.7 g kg(-1) d(-1).Strong
- A minimum daily protein intake of ≥1.6 g/kg is necessary to observe significant improvements in muscle mass from whey protein supplementation.Strong
- Most athletes ideally need 1.2 to 2.0 grams/kg of body weight/day of protein, preferably split across 3-4 meals.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →