Is high or low impact better?

Neither is inherently “better”; the best choice depends on your fitness level, goals, and any existing conditions. High-impact exercise is excellent for building bone density ( 20 ), while low-impact exercise is more gentle on joints ( 21 ). Both can be used to improve cardiovascular fitness and support fat loss.

Which burns more fat, HIIT or cardio?

HIIT generally burns more fat in less time than traditional, steady-state cardio. This is due to the high caloric expenditure during the workout and the extended “afterburn” effect (EPOC) where your metabolism remains elevated for hours ( 4 ). However, both are effective tools for creating a calorie deficit.

Can you build muscle with low-impact workouts?

Yes, you can absolutely build muscle with low-impact workouts. Muscle growth is stimulated by mechanical tension, which is the force placed on muscles during resistance training ( 22 ). However, HIIT is generally designed to improve cardiovascular fitness rather than serve as a primary muscle-building method. For muscle growth, prioritize structured strength training with adequate resistance, while using low-impact cardio such as cycling or rowing as a complement.

Are jumping jacks considered high impact?

Yes, jumping jacks are generally considered a high-impact exercise because both feet leave the ground during each repetition. However, the impact is typically lower than in exercises involving higher jumps or faster landings. Keeping the jumps small and landing softly with slightly bent knees can further reduce the force on the ankles, knees, and hips.

Can you get toned without sweating?

Getting “toned” means building muscle and reducing body fat to reveal muscle definition. While sweating is a common byproduct of intense exercise that raises your body temperature ( 23 ), it is not a direct indicator of workout effectiveness or fat burn. You can build muscle through resistance training with minimal sweating and still achieve a toned physique.

At what age is it hardest to lose weight?

Weight-management experiences can change with age for many reasons, including activity, body composition, sleep, health status, and individual variation. This is due to a natural decline in metabolic rate, hormonal changes (like decreased estrogen in women and testosterone in men), and a tendency to lose muscle mass (sarcopenia), all of which can make it more difficult to create a calorie deficit ( 24 ).