Which sequence best completes the text below?

Riding a bicycle is a low impact form of exercise that can be enjoyed by people of all ages and fitness levels. It can help (1) your general health while (2) gentle on your joints. It's also a great way (3) fun, get fit and spend time with friends and family. Always (4) a helmet and be aware of traffic rules when on the road.

(Adapted from: http: / /www.betterhealth.vic.gov.au)