1RM
One-repetition maximum, or one-rep max: the maximum weight a lifter can handle for one rep of a given exercise. A useful tool for determining training loads, which are often based on different percentages of your 1RM.
COMPOUND LIFT
Any exercise that involves movement in two or more joints, such as the squat, deadlift and shoulder press. Such lifts should form the basis of programmes where increasing muscle size and strength is the main objective.
CONCENTRIC CONTRACTION
During concentric contractions, the muscle shortens while generating force. Concentric muscle actions are responsible for the 'raising' part of an exercise, such as lifting a dumbbell up from your side to your shoulder during when performing a biceps curl.
DOMS
Delayed-onset muscle soreness - otherwise known as the aches you get
