Begin in a plank position on the forearms. Press the hips up toward the ceiling while staying on the forearms (like an upside 'v') and gently press the heels to the floor. Hold briefly, then come back to your plank and push up onto the hands. Hold (back straight) for a few counts and then press back into a downward dog, stretching the heels to the floor and the chest gently through the arms. Come back into your plank, lower down to the elbows and repeat the entire series.
The workout includes a dynamic warm-up to get your blood flowing and prep your body for the rest of the work ahead, and a cool-down to help you slow back down and wrap it all up. If you want to make the workout more challenging—maybe you've done it a handful of times and are ready to turn things up a notch—add weights to the lunge and squat movements. You can also, like Sims said, add another round of the main strength circuit.
Exercise with a rowing machine. Using a rowing machine will help you burn calories and tone your arms. To use the machine, strap in your feet and reach forward to grab the handlebar. Keep your back straight and your knees bent. Push off with your legs and pull the handlebar toward your chest. Then, extend your arms and bend your knees again as the handlebar goes back to the starting position.
For those sticklers who object to this regimen as a violation of the no-equipment stipulation—what are you, trapped in a shipping container?—Okafor has a go-to airport circuit, too, no chair required: four rounds of 20 squats, 20 lunges (with each leg), and 30 bicycle crunches. Maybe you're thinking: the airport? But don't people give you weird looks? "Of course," Okafor says. "But they're usually out of shape." Spoken like a man who isn't one bit afraid to curl a chair with a towel.
This may be the most worthwhile reason for exercising there is. Studies have shown how people who exercise are at a significantly reduced risk of developing dementia like Alzheimer’s disease. And even for people who start exercising relatively late in life, brain volume can actually increase over time, as can scores on memory tests, compared to people who don’t exercise (their brains shrunk over time, which is normal part of aging).
You'll also build muscle to fill out your arms and firm them up. “Generally, when people are complaining about underarm jiggle, they’re usually referring to the area that is governed by the tricep,” says Williams. “If the jiggle or looseness in that part of your arm is due to a lack of muscle, then strengthening and building muscle in your tricep will also create some change in the aesthetic of that area.” She recommends performing triceps push-ups, extensions, and dips to hone in on that area and add some muscular definition to your arms.
"You'll definitely feel a minute of boat with the belly drawn in and the chest lifted," says West. It's tough to hold this for the full 60 seconds, but there's no better way to end a workout than with a challenge, right? (That being said, if you are struggling to maintain proper form for the full minute, take a break after 30 seconds, reset, and try holding for another 30.)
Research has shown that to manage weight, you should exercise energetically for at least 30 minutes a day. You can also do an hour of intensive exercise every second day if this fits into your schedule more easily. Be consistent and be regular. Do those one-hour exercise sessions three to four times every week, not just one week a month, and you will achieve the result you desire - to lose weight and keep it off, says Dr Ingrid van Heerden, registered dietician.