As people age, losing body fat while maintaining muscle mass becomes increasingly important for overall health and physical independence. A recent study published in Maturitas found that high-intensity interval training (HIIT) may be the most effective type of exercise for achieving this goal.
HIIT involves short bursts of intense exercise followed by periods of easier recovery, which can help challenge the body and preserve muscle tissue. Researchers from the University of the Sunshine Coast compared the effects of HIIT, moderate-intensity exercise, and low-intensity exercise on body composition in 123 healthy older adults.
Key Takeaways
- HIIT is effective for reducing fat mass and maintaining lean muscle in older adults.
- HIIT can help improve cardiovascular fitness and reduce abdominal fat.
- Other forms of exercise, such as moderate-intensity exercise and resistance training, may also be beneficial for older adults.
Who is affected by HIIT?
The study found that HIIT was particularly beneficial for older adults who want to reduce fat without sacrificing lean muscle. Participants who completed HIIT sessions for six months experienced significant reductions in fat mass while maintaining their lean tissue.
What the study reveals about HIIT
The researchers measured body composition at the beginning, middle, and end of the study using a specialized scanning technique. They found that HIIT not only reduced fat mass but also helped preserve lean muscle, which is essential for physical independence and mobility.
By the numbers
- 123 healthy older adults participated in the study.
- 72 years was the average age of the participants.
- 26kg/m2 was the average body mass index of the participants.
- 6 months was the duration of the study.
- 45 minutes was the length of each supervised gym session.
How HIIT works
According to the researchers, HIIT works by putting more stress on the muscles, giving the body a stronger signal to maintain muscle tissue rather than lose it. This is consistent with the idea that muscles adapt to the demands placed on them, and when exercise provides a sufficiently challenging stimulus, the body has more reason to preserve the tissues needed to perform that activity.
Benefits of HIIT for older adults
The study highlights the importance of HIIT for older adults, particularly in terms of maintaining muscle mass and reducing the risk of chronic diseases. The researchers found that HIIT not only reduced fat mass but also improved cardiovascular fitness and reduced abdominal fat, which is associated with insulin resistance, cardiovascular disease, and other metabolic problems.
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Other studies on HIIT
Other studies have also investigated the effects of HIIT on older adults. A 2026 study published in Medicine & Science in Sports & Exercise found that HIIT can be effective when completed at home with remote supervision. Another 2026 study published in The Journals of Gerontology, Series A: Biological Sciences and Medical Sciences found that HIIT was comparable to continuous moderate-intensity exercise in terms of body composition changes in older adults living with HIV.
Frequently Asked Questions
What is HIIT?
High-intensity interval training involves short bursts of intense exercise followed by periods of easier recovery.
How does HIIT benefit older adults?
HIIT can help reduce fat mass, maintain lean muscle, and improve cardiovascular fitness in older adults.
Can HIIT be done at home?
Yes, HIIT can be done at home with remote supervision, and it can be an effective way to improve fitness and reduce fat mass.
