Little things that can derail a workout

Jerking to lift weights: Make sure your lifts are slow and controlled.

Leaning on the handrails of the stair climber, elliptical trainer, or treadmill: This makes the workout less challenging and can injure your wrists and back.

Not getting enough rest: Working out when you're fatigued can lead to sloppy technique and an injury.

Locking your knees: Always keep your knees slightly bent to prevent an injury.

Not warming up: Don't try to shave time off your workout by skipping the warm up or you could end up on the bench.

Getting stuck in a rut: If you're just going through the motions during your workout, shake things up by trying something new!