• Men's Health

  • Men's Health

  • Men's Health

  • Men's Health

It doesn't matter how much you can lift or how long you've been lifting--one bad move can still land you on the disabled list. "Some of the most popular exercises out there are also among the most dangerous and ineffective," says Mike Boyle, owner of Mike Boyle Strength and conditioning in Woburn, Mass. Purge these body breakers from your routine before they stall your progress--or send you to the sidelines.

(Find out who topped the list of the 100 Fittest Men of All Time as selected by the editors of Men's Health.)

  • 1. Kipping Pullup

    Men's Health

    DITCH IT: Kipping Pullup
    This move adds momentum-generating hip thrusts to the standard pullup and is a favorite of extreme-workout programs. It's also good for guys who struggle with the classic exercise. "It's a simple way to do more reps," says Boyle, "but each one violently pulls your shoulder joints, which are among the most delicate in your body."

    DO IT: Chinup
    Most men are able to complete more chinups than pullups--that's because the underhand grip allows the biceps to participate more in the exercise. Grab a chinup bar using a shoulder-width, underhand grip, and hang at arm's length. Cross your ankles behind you. Pull your chest to the bar, pause, and return to a dead hang with your arms fully extended.

    (Is your workout burning flab--or just burning up your time? Don't fall for these 5 Fat-Loss Myths.)

  • 2. 45-Degree Leg Press

    Men's Health

    DITCH IT: 45-Degree Leg Press
    "This exercise forces your back into a rounded position and compresses your spine," says Craig Ballantyne, author of Turbulence Training. "That can cause a herniated disk." Plus, the move doesn't engage your core or stabilizing muscles, so any gains from it won't translate well beyond the gym.

    DO IT: Dumbbell Bulgarian Split Squat
    "This exercise is much closer to real-world movements," says Ballantyne, "and it hits your core and tests your balance." Holding a pair of dumbbells at arm's length next to your sides (palms in), place the top of one foot on a bench behind you. Lower your body as far as you can. Pause, and return to the starting position. Do the same number of reps on each side.

    (Build the world's best workout ever with 10-Minute Torchers from Men's Health. Mix and match dozens of 10 minute routines for a seemingly endless variety of workouts.)

  • 3. Dip

    Men's Health

    DITCH IT: Dip
    Performed correctly, this exercise is an excellent muscle builder. "But perfectly executed dips are like unicorns," says Boyle. "They're talked about but never seen." And shoddy dips--done with flared elbows and a vertical torso--increase the strain on your rotator cuffs, which are the most vulnerable components of your shoulders.

    DO IT: Close-Hands Pushup
    "Most guys do dips to hit their chest and triceps," Boyle says. "A close-hands pushup provides the same benefits without the risks." Assume a pushup position with your hands directly under your shoulders. Keep your elbows tucked against your sides as you lower your body until your chest nearly touches the floor. Pause, and push back up explosively.

    (The greatest exercise of all time just got better. Click here to learn The Pushup That Blasts Your Core.)

  • 4. Bodybuilder Bench Press

    Men's Health

    DITCH IT: Bodybuilder Bench Press
    Bodybuilders and many gym rats flare their elbows to focus more weight on (and trigger more growth in) their pecs. The problem is, that also increases the stress on their rotator cuffs, says Ballantyne.

    DO IT: Powerlifting Bench Press
    Powerlifters focus on moving as much weight as possible. To do that, they leverage as many muscles as they can by keeping their elbows close to their sides. "That also minimizes shoulder strain," says Ballantyne. Hold a barbell using an overhand grip that's slightly beyond shoulder width. Keep your elbows tucked as you lower the bar to just below your nipples.