Bicycle
Target muscles Abs, obliques
START Lie flat on the floor with your legs straight and fingers by your temples. Raise your torso off the ground by contracting your upper abs.
FINISH As your torso comes up, bring in one leg by bending your knee, then rotate your chest so your opposite elbow touches that knee. Reverse the movement to the start, then repeat with the other elbow and knee.
Crunch
Target muscles Abs
START Lie flat on the floor with knees bent and fingers by your temples. Keeping your chin up, raise your torso off the ground by contracting your abs.
FINISH Hold the position at the top of the move, squeezing your abs, then lower your torso back to the start.
Decline press-up
Target muscles Chest, triceps, shoulders
START Get into a press-up position with your hands just wider than shoulder-width apart and your feet on a box, bench or sofa. Keep your abs braced.
FINISH Lower your body until your chest touches the floor and then press back up.
Diamond press-up
Target muscles Triceps, chest, shoulders
Start in a
