“You can move freely without being attached to, or even contracted by, a weight machine,” says Olson. “Functional moves make us better at the things that really matter in our everyday lives, such as squatting down to pick up groceries or reaching overhead to put something on a shelf.” For equipment-free strengthening, try this bodyweight exercise program, which was designed by Olson, four times a week for six weeks. In that time you’ll get stronger overall, which translates to a tighter physique, says Olson. Because the moves can be done anywhere, you can fit in this workout on the fly, even if you’re stuck on a conference call or in a far-flung hotel.

8 Great Bodyweight Exercises

Step 1: Start standing with feet wider than hips and legs slightly turned out. Step 2: Bend knees, lowering the hips so thighs are parallel to ground. Straighten knees for one rep. Do 20 reps. RELATED: Here’s How to Do Squats Properly, Safely, and Effectively Every Time Step 1: Start standing with hands on hips, right foot about 2 feet in front of left. Step 2: Bend right knee over right ankle, lowering hips and left knee toward the ground. Step 3: Straighten right knee, returning to start position for one rep. Do 15 reps. Repeat on the left side. Step 1: Start lying face-up with hands crossed behind your head. Draw knees toward chest and lift head, neck, and shoulders off the floor. Step 2: Twist upper body right, drawing left elbow toward right knee. At the same time, extend the left leg. Return to start position. Repeat to left for one rep. Do 20 reps. Step 1: Bring forearms to the ground with hands clasped and elbows under shoulders. Step 2: Lift knees and step feet back so weight is on balls of feet and hands, and body is in line from shoulders to hips to heels. Hold for one minute. RELATED: How to Do a Plank Step 1: Start on all fours with hands under shoulders and knees under hips. Lift knees and step feet back so weight is on balls of feet and hands, and body is in line from shoulders to heels. Step 2: Bend elbows, lowering body toward the ground. Straighten elbows to return to start position for one rep. Do 10 reps. Step 1: Start standing with feet under hips. Step 2: Lift heels off ground, coming onto balls of feet. Lower heels for one rep. Do 30 reps. Step 1: Start lying face-up with feet lifted toward the ceiling and arms open in a V position outside hips, palms down. Step 2: Slowly lift hips 1 to 2 inches, arcing legs up and toward the chest. Slowly lower to start position for one rep. Do 15 reps. Step 1: Start lying face-down with arms overhead. Step 2: Hover arms, head, chest, and legs off ground, pulling the waistline away from the floor. Hold for one breath then return to the start position for one rep. Do 10 reps.