Even at the age of 51, actress, model, dancer, Malaika Arora is still the epitome of fitness. She does not let her age define her fitness routine and always stays on top of the fitness game. How does she manage to do all that? The answer lies in a recent Instagram video that she shared, captioned, "Burn fat, build fire". View this post on Instagram A post shared by Malaika Arora (@malaikaaroraofficial)]]>In that video, she shared some quick, at-home HIIT (High-Intensity Interval Training) workouts that can help burn fat and also improve muscle mass. While the video features exercises like burpees, around the world with a dumbbell, ballistic rows, boxing punches with props, and standing oblique crunch with a dumbbell. There are other home HIIT workouts you can try which do not require you to use weights or any props. Here's what you can do:Jump SquatsIt is a bodyweight move using explosive plyometric power. Many muscles are at work when you do a jump squat, especially your leg muscles, quadriceps, hamstrings, glutes, calves, and core muscles. You can stand with feet shoulder width apart and knees slightly bent. Then bend your knees into a full squat. Ensure to ensure your muscles to push your body off the floor and extend through your legs. Your feet will be a few inches off the floor and now descend and control your landing. Come back into a descending squat again. Repeat. Mountain ClimbersMountain climbers are a high-intensity exercise that targets your core, shoulders, and legs. To perform mountain climbers, start in a plank position. Bring your right knee towards your chest, then quickly switch legs and bring your left knee towards your chest. Continue alternating legs as quickly as you can. Mountain climbers are a great exercise for improving your cardiovascular fitness, core strength, and coordination.Glute BridgesA glute bridge is used to activate your glutes and increase your core stability. It also helps with back pain. Lie on your back. Bend your knees and keep your feet flat on the floor, about shoulder-width apart. Your toes should point straight ahead, and your heels should be about 6–8 inches away from your hips. Rest your arms by your sides with your palms facing up. Slowly lift your hips off the ground. Tighten your glutes (butt muscles) and abs as you do this. Don’t let your back arch. Keep lifting your hips until your body forms a straight line from your shoulders to your knees. At the top, squeeze your glutes tightly and hold for a few seconds. Slowly lower your hips back down, keeping your abs and glutes tight the whole time.Plank Shoulder TapsIt helps to stabilize your whole body and also targets your core and shoulders without straining your spine. You can start in a plank position. Ensure that your wrists are under your shoulders and your feet is hip-width apart. Touch your left shoulder with your right hand and come back into a plank position. Do the same to the other side and then repeat.High KneesThe weighted high knee exercise is one of the finest ways to prevent falls. Strength coaches and physical therapists suggest this is a cardio-intensive activity that increases cardiovascular endurance and heart rate. Additionally, it enhances circulation and fortifies the heart.The high knee exercise also improves balance and strength, all of which are critical for preventing falls as you age.To improve your balance, begin the high knee exercise without any weights. Feel the earth beneath both feet while standing with your feet hip-width apart (if you're not using weights, you can stand barefoot). As you bend your right knee, shift your weight to your left foot and use the muscles in your left leg. Use a countertop or wall for balance if needed.To engage your left leg and hip, raise your right thigh until it is parallel to the floor and plant your left foot firmly. Keeping your right thigh horizontal, apply light pressure with your right hand to increase resistance. You might sense that your core is stabilizing you. After a few seconds of holding, switch legs. For each leg, aim for 12 repetitions.Add dumbbells to make it more difficult.