Terms: Muscle Efficiency (2,580), muscle fibers (869,000), muscle contraction (1,020,000), muscle characteristics (2,200), strength training (5,280,000),
Boolean: calories AND walking (3,220,000), calories AND lifting (1,200,000), calories AND efficiency (709,000), calories AND "peak power" (1,990), power AND cooling (40,000,000), calories AND rowing (464,000),
Boolean: calories AND walking AND formula (291,000),
Terms: rowing (23,200,000), ergometers (138,000), ergometer (398,000),
Terms: calories burned during exercise (29,800),
Calories Burned During Exercise