It’s happened to the best of us: We gear up, cue up a killer cycling routine, and head straight for the gym— only to find out it’s temporarily closed (curse you, maintenance!). With heavy hearts and glutes dying to feel the burn, we sullenly make our way back home. At this point, you may be tempted to give up for the remainder of the day, but don’t change out of your gym clothes just yet! You already have the only workout machine you need on you.

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.
Love 'em or hate 'em, you can't talk about ultra-effective no-equipment exercises without mentioning burpees (especially when there's a push-up incorporated). "The burpee with push-up is a full-body exercise that works your core, arms, quads, glutes, and hamstrings," explains Harbison. "[They also] rapidly increase your heart rate, especially if you add an explosive jump at the end of the movement." Strength, check. Cardio, check.
A new study from her lab shows that a 20-minute moderate workout has measurable effects on the immune system: Participants were asked to walk or jog on a treadmill, depending on their fitness level. They measured levels of TNF, an inflammatory marker, before and after the exercise, and found that there was a 5% reduction in the number of immune cells that produced the marker.
And research published in November 2017 in the journal NeuroImage showed that aerobic exercise may be helpful in improving memory function and maintaining brain health as we age. The study, led by researchers at Australia's National Institute of Complementary Medicine at Western Sydney University, looked at brain scans of 737 people ranging in ages from 26 to 76. The group included a mix of healthy adults, people with Alzheimer's and other cognitive impairments, and people with a clinical diagnosis of mental illness, including depression and schizophrenia. The researchers found that exercises, like riding a stationary bike, running on a treadmill, or walking, slowed down the deterioration of brain size and slowed the effect of age on brain health.
Start the clock, and immediately do 10 plank taps in perfect form. When you’re done with the plank taps, go straight into jumping jacks until the clock reads 1:00. Then move on to the next move, walkouts, and do 10 perfect reps of those. Jumping jacks again until the clock reads 2:00. When you get to single-leg deadlifts, do 10 of those perfectly — stay on the same standing leg throughout — and finish out the minute with jumping jacks until it’s time for the next move at minute 3. Finish the circuit with 10 perfect jumping lunges.
Start the clock, and immediately do 10 reverse lunges in perfect form. When you’re done with the reverse lunges, go straight into jumping jacks until the clock reads 1:00 minute. Then move on to the next move. Do each move 10 times perfectly starting at the top of the minute, and finish out the minute with jumping jacks until it’s time for the next move. For the single-leg deadlift, do 10 on only one side (don't change your standing leg during any set of 10 reps).
Downward dog is another Sun Salutation pose that tones the arms. For this pose, your body will form a reverse V-shape with your heels pressed down or close to the floor and your hands flat on the floor. Ideally, your spine will follow a straight line toward the ground with your hips pressed back. You may need to bend your knees to keep your body in the reverse V-shape.
Harrison is also a hardcore burpee devotee. "It's a full-body exercise that will get your heart rate up, and it can be progressed and regressed in a variety of ways," she explains. (Psst—here are nine ways to do a burpee, no matter what your level is.) But her go-to burpee has a twist: "I also really love mountain climbers for some of the same reasons, so why not combine them?" The combo of the two will skyrocket your heart rate for a major cardio challenge.
If you've decided that it's time to learn how to lose arm fat, use this guide as your go-to resource. You'll learn which exercises to do, what eating plan works best and what to do about arm fat when diet and exercise don't work. Pick one workout to do each day, but try to do something on most days of the week to get results that you (and your friends) will notice.
So short of moving to a blue zone, exercising for just 10 minutes a day, or 75 minutes a week, can earn you an extra 1.8 years. The findings held true even for those individuals who were overweight or obese; adding exercise helped them live longer, while being obese and inactive decreased life span by up to 7.2 years. The benefits of adding more exercise increased and then plateaued at about 300 minutes of weekly exercise (or an hour five days a week) adding an extra 4.2 years of life.
And perhaps one of the best new findings about exercise — especially if you, like many people, struggle to find the time to fit it into a busy day — is that all those benefits of physical activity can be had even if you only squeeze in a few minutes of exercise a day. While doctors used to think that we needed to engage in 30 to 60 minutes of exercise a day, new research is finding that we can see benefits with shorter bursts of physical activity. “As little as 15 minutes a day of high-intensity activity that leaves you breathless, like swimming, can kick start your metabolic rate and reduce body fat and increase muscle mass,” says Dr. Berger.
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