Work Your Arms and Abs Using Just Your Body Weight

There's no need to pay pricey gym fees to build strength in your upper body and core. All you need is a little space — your basement, spare room or neighborhood park will do just fine — and your own body weight to work your arms, shoulders, chest, upper and lower back, obliques and abs.

Consider the following body-weight workout a sort of "choose your own adventure." With each exercise below, you can pick one of the variations and do them for the given number of reps.

Prime your muscles for action by warming up before every workout (including this one!). Jog in place, jump rope or do jumping jacks — or a combination of all of the above — for three minutes to get your blood moving. Then, do a few dynamic stretches for each part of your body you'll be working.

Move 1: Arm Circles

1. Extend your arms out to either side.
2. Move them in circles, making the circles gradually larger until you reach full range of motion.
3. Repeat, making circles to the back.

Move 2: Dynamic Chest Stretch

1. Open your arms out to the side as wide as you can.
2. Bring your palms together with your arms straight in front of you.
3. Repeat this 10 times, opening your arms wider each time.

Move 3: Core Warm-Up Sequence

1. Rotate side to side, swinging your arms
2. Then to dynamic side bends, leaning to one side, then the other.

Read more: 9 Warm-Up and Cooldown Mistakes Wrecking Your Workout

You can do each of these exercises for the recommended number of sets in a linear fashion, pausing for a rest between sets, or you can do a circuit routine doing one set of each exercise with little to no rest in between sets, then repeating the circuit three or four times.

Move 1: Push-Ups

Push-ups are a go-to exercise for the upper body and core that you can do anywhere. Include one of the following types of push-ups (listed from easiest to hardest) in your body-weight workout:

Option 1: Knee Push-Ups

1. Start on your hands and knees with your hands directly underneath your shoulders.
2. Inch your knees back until your shoulders and hips are in one straight line.
3. Keep your abs contracted as you slowly lower your chest toward the floor, elbows bending out to either side, but slightly angled in toward your sides.
4. Push back up to the starting position until your arms are straight.

Option 2: Traditional Push-Ups

1. Keep your knees lifted and your body in one straight line from heels to head throughout the exercise.
2. Lower as far down as you can without actually collapsing to the floor.
3. Push yourself back up to the starting position.

Option 3: Alternating Shoulder-Tap Push-Ups

1. Perform traditional push-ups.
2. At the top of each push-up, lift one hand off the ground, bringing it across your body to tap the opposite shoulder.
3. Do the same with the other hand.

Reps: two to four sets of eight to 12

Move 2: Triceps Dips

You can do dips on a park bench, a piano bench or a chair to strengthen your triceps, shoulders and chest.

Option 1: Bench Dip

1. Sit on a bench with your hands grasping the edge of the bench on either side of your hips.
2. Scoot your hips forward off the bench and walk your feet out just far enough that your knees are bent at about 90 degrees.
3. Slowly bend at the elbows as you lower your buttocks down toward the ground.
4. Stop when you feel a stretch in your chest or shoulders or when your bottom touches the floor.
5. Push back up to the starting position.

Option 2: Straight-Leg Bench Dip

• Extend your feet out on the floor with your legs straight while doing the bench dip.

Reps: two to four sets of eight

Move 3: Pull-Ups

To do pull-ups, you'll need to install a pull-up bar at home, do this workout at the gym or find a bar high enough to do pull-ups at your local park. Pull-ups work your back, biceps, shoulders and even your chest. Choose a variation below, listed easiest to hardest:

Option 1: Negatives Pull-Ups

1. Stand on a box and grasp the pull-up bar a little wider than shoulder-width.
2. Jump up so that you easily assume the top position of a pull up.
3. As slowly as you can, lower yourself down until your arms are straight.
4. Drop down to the floor from the bar, climb up on the box and repeat.

Option 2: Band Pull-Ups

1. Loop an exercise band around the bar and secure it so one end hangs down like a stirrup.
2. Put one foot in the stirrup and jump up or step up on a box to grasp the bar.
3. Wrap the ankle of the free leg around the ankle of the leg in the stirrup.
4. Slowly bend your elbows out to the side and pull yourself up until your chin passes the bar.
5. Lower yourself back down with control.

Option 3: Traditional Pull-Ups

1. Grasp the bar and without momentum pull your body weight up until your chin passes the bar.
2. Lower yourself back down with control.

Reps: two to four sets of six to 12

Read more: 10 Exercises to Help You Conquer the Pull-Up

Move 4: Bicycle Crunches

A study commissioned in 2001 by the American Council on Exercise found that bicycle crunches were the best abdominal exercise as measured by electromyography equipment. Do them rapid fire or slow and controlled to work muscle endurance and build strength.

1. Lie on your back on an exercise mat. Press your lower back into the mat and put your hands on your head behind your ears.
2. Lift your shoulder blades off the mat and bend your knees to 90 degrees so that your calves are parallel to the mat.
3. Exhale as you bring your right knee toward your left elbow, extending your left leg and twisting your torso to the right.
4. Inhale back to center and switch sides.

Reps: three sets of 10 to 30

Move 5: Planks

Static hold plank is an isometric exercise that works your entire core. See how long you can hold it without your hips or lower back caving in.

1. Assume a push-up position with your hands under your shoulders. Keep your body in one strong, straight line from head to heels.
2. Press up and out of your shoulder blades a little bit. Keep your neck long.
3. Hold for 30 seconds to one minute, or longer. Repeat three times.

Read more: The Perfect 3-Minute Stretching Routine for When You're Too Busy to Cool Down