Exercisers of all fitness levels hoist and hurl sledgehammers, oversize tires, and kettlebells during one-hour boot-camp sessions

Daily changing combinations of structural, gymnastic, and weight-lifting moves quickly whip exercisers into shape

Military-inspired boot camps whip bodies into shape with no-nonsense, intense exercises lead by instructors donning fatigues

Prominent gym franchise's 2 area locations beckon exercisers to 24-hour facilities with high-tech equipment & motivational boot-camp classes

Personal trainers keep minds & muscles alert with constantly changing workouts that feature free weights, tire flipping & endurance training

Trainers helm metabolism-boosting regimens that work in cahoots with nutrition plans & at-home programs, toning physiques in timely fashion

Can burn 500–1,000 calories per class; Variety of times & locations; Skilled, attentive coaches;