Plyometrics is a series of drills designed to connect strength with speed to produce power. Also known as "jump training," this technique emerged in Eastern Europe in the early 1970s. Coined by American track coach Fred Will, the term derives from the Latin plyo+metrics, or "measurable increases." Plyometrics training relates to any activity that requires speed and strength, as it improves your ability to run faster, jump higher, and maneuver in multidirectional sports. If your game involves a court, field, track, mat, pool, ring, rink, or mountain, plyometrics can help.

An exercise video with instructor Traci Lords warming up with various aerobics and stretch exercises.

Using explosive and defensive-style movements, this fast-paced cardio-conditioning workout will help you carve a tight, lean body.

Get ready to squat, lunge, and pull for a total-body workout like no other.

National Aerobic Champion Michelle LeMay teams up with award-winning artist Kurt Carr and the Kurt Carr Singers for this uplifting tape, which gives you a great, low-impact forty-five-minute cardio workout as you move and groove to such gospel favorites as "Kumbaya," "This Little Light of Mine," "Amen," and "Whole World in His Hands." With their enthusiasm and energy, Michelle LeMay and the Kurt Carr Singers will have you raising your hands and voice to the Lord even while you dance your way to better health, fitness, and weight-loss. Remember, the more you move it, the more you lose it. So stretch and shake it out as "Do You Know Him?" gets your body moving and blood flowing. Then enjoy a relaxing cool-down with "Amazing Grace."

Flex those powerful biceps and focus on toning and tightening these showcase arm muscles.

A fun, low-impact cardio routine that will leave you feeling lean and mean.

Target both large and small upper-body muscles to push you to the brink.

Achieve a higher level of athleticism over a longer period of time, plus prevent injuries and avoid plateaus.

Combines strength, balance, flexibility, and breath work to enhance your physique and calm your mind.

Kick things up a notch with Muay Thai-inspired elbows and kicks for a head-to-toe shred that can lean you out fast.

Upper body and core-focused, this Boxing-influenced workout is short-but packs a serious punch.

A total-body burner that uses explosive power and interval training to help sculpt lean muscle and build next-level endurance.

Rare workout video from the 1980s hosted by Laura Gemser, delivering her instructions to a team of toned and athletic dancers as they sweat and groove on a set drenched in abstract 80s design sensibilities.

An hour-long workout with a BDSM theme on a NYC rooftop, taught by a variety of instructors.

Line dancing is fast becoming a popular activity among senior citizens. This presents line dancing from an instructional, yet entertaining perspective. Join Dr. Grant Longley, an expert Line Dance instructor, as he guides a class step-by-step through five dances.

Superset two of the body's largest muscle groups for a lactic acid bath like no other! You'll be fully pumped five minutes into the program, and your muscles will beg for mercy the rest of the way. Your body will learn how to keep it together under duress as you struggle to meet your target number of reps during round two. And if you feel a little queasy after your set, at least you'll know you're not alone.

Applying the same principles as Chest and Back, you'll superset these muscle groups to exhaustion. As you'll be using smaller muscles, this might prove slightly less of a struggle - but that doesn't mean you won't be fully maxed when this workout is said and done. Just be sure to keep your form during the latter part of the routine, when you'll be tempted to cheat your range of motion. Maintaining good form is critical for proper muscular development and preventing injury, so stay strict and get ripped!

Adds serious strength to your entire upper body.

A do-anywhere, do-anytime body-pumping drill.