Researchers at the University of the Sunshine Coast discovered that high‑intensity interval training (HIIT) is a powerful tool for older people who want to lose fat while keeping their muscles.
The team compared three exercise styles in healthy seniors. All three helped people lose some weight, but only HIIT stopped muscle loss.
What the Study Found
Exercise intensity matters for body shape. Moderate‑level workouts also lowered fat, but they caused a tiny drop in muscle. HIIT, on the other hand, kept muscle intact.
Both high‑ and moderate‑intensity programs improved the amount of belly fat. The researchers still need to look more closely at low‑intensity results.
Changes in body composition are linked to many chronic illnesses that appear later in life, making these findings very important.
Six Months of Supervised Workouts
More than 120 active seniors from Greater Brisbane took part. Each person exercised in a gym three times a week for six months.
The average participant was 72 years old with a body‑mass index of 26 kg/m², a normal range for people over 65.
Why HIIT Protects Muscle
HIIT involves short bursts of very hard effort followed by easy recovery periods. During the hard bursts, breathing is heavy and talking is tough.
These intense bursts stress the muscles more, sending a strong signal to the body to keep muscle tissue rather than lose it.