"Radio exercises are general exercises aimed at improving the nation's physical fitness and maintaining and promoting health. It’s a light routine of about three minutes that moves every part of the body."
**"Radio exercises are general exercises aimed at improving the nation's physical fitness and maintaining and promoting health. It’s a light routine of about three minutes that moves every part of the body."**
* **aimed at improving the nation's physical fitness**(国民の体力向上を目的とした)
* **maintaining and promoting health**(健康の保持や増進)
* **general exercises**(一般向けの体操)
というフレーズが自然です。