Set yourself a comfortable distance from the box with feet shoulder width apart. Drop quickly into a quarter squat, swing your arms and explode upwards to jump onto the box. Land as softly as possible. Now step backwards off the box under control.
Place a kettlebell a couple of feet in front of you. Stand with your feet slightly wider than shoulder-width apart and bend your knees to lean forward and grab the handle with both hands. With your back flat, engage your lats to pull the weight between your legs (be careful with how deep you swing) then drive your hips forward and explosively pull the kettlebell up to shoulder height with your arms straight in front of you. Return to the start position and repeat without pauses.
Stand with your feet more than shoulder-width apart and hold a barbell across your upper back with an overhand grip – avoid resting it on your neck. Hug the bar into your traps to engage your upper back muscles. Slowly sit back into a squat with head up, back straight and backside out. Lower until your hips are aligned with your knees, with your legs at 90 degrees – a deeper squat will be more beneficial but get the strength and flexibility first. Drive your heels into the floor to push yourself explosively back up. Keep form until you’re stood up straight: that’s one.
Barbell Bulgarian split squat
Stand facing away from the bench, holding a barbell across your upper back. Have one leg resting on the bench behind you, laces down. Squat with your standing leg until the knee of your trailing leg almost touches the floor. Push up through your front foot to return to the start position.
Kettlebell goblet squat
Stand with your legs slightly wider than shoulder-width apart, clasping a kettlebell in each hand in front of your chest with palms facing each other. Bend your knees and lower yourself into a squat, keeping the kettlebells in the same position and ensuring you don't round your black by tensing your glutes throughout. Drive back up and repeat.
Squat down, keeping your back straight, until your thighs are parallel with the floor and your bum is about level with your knees. Explode upwards into a jump, and go straight into the next squat.
Get in a press-up position but rest on your forearms rather than your hands. Make sure your back is straight and tense your abs and your glutes. Hold without allowing your hips to sag.