Long jump consists of four phases: approach run-up, take-off, flight, and landing. Athletes must balance speed, technique, and strength for maximum distance
Stand with feet shoulder-width apart and knees over second toe. Crouch into half-squat position with arms hanging loosely. Push off from balls of feet and extend body quickly. Swing arms forward and up during jump. Land on balls of feet with knees slightly bent
Vertical jump is highest off two feet. Feet should be shoulder-width apart with 30-degree hip flexion. Knees should be bent 60 degrees, ankles 25 degrees. Spring off balls of feet with arms parallel behind rear. Land on balls of feet, roll back to heels
Step length is measured by dividing total distance by 10 steps. Stride length is calculated by multiplying step length by 2. Average stride length is about 0.41 times height
Bicep curl variations differ by hand position and resistance angle. Exercise must involve elbow flexion and recruit biceps brachii. Selection depends on relative intensity and muscular recruitment
Flexibility is the ability to move joints and muscles through full range of motion. It's one of five health-related components of fitness. Inflexibility increases risk of muscle tears and strains