Resistance training increases myofibrillar protein synthesis in middle-to-older aged adults consuming a typical diet with no influence of protein source: a randomized controlled trial

For adults aged 50 to 70 who consume 1.0 gram of protein per kilogram of body weight daily, myofibrillar protein synthesis rates are the same whether the protein comes from whey or pea, during both resistance training and rest over 10 days.

In adults aged 50–70, 10 days of resistance training increases myofibrillar protein synthesis but does not lead to measurable improvements in muscle strength, muscle structure, or nerve signaling to muscles.

In adults aged 50 to 70, performing resistance training every other day for 10 days increases the rate of muscle protein synthesis by 11-12%, whether their daily protein comes from animal or plant sources.

In adults aged 50–70, consuming 1.0 gram of plant-based protein per kilogram of body weight for 10 days lowers non-HDL cholesterol by about 13% without changing other blood lipids, kidney function, or nitrogen balance.

For adults aged 50 to 70, consuming 1.0 gram of protein per kilogram of body weight each day, spread across meals and sourced from either whey or pea protein, maintains nitrogen balance over 10 days without change, regardless of the protein type.

Resistance-trained adults who consume 0.7 to 1.0 grams of protein per pound of body weight each day maintain and build muscle.