Best... kettlebell
Opti 4kg kettlebell weight, £19.95, Argos
The Opti range at Argos is a go-to for affordable fitness kit you can use at home. Grab this bright kettlebell to boost your lunges and squats – you’ll tone up, strengthen your core and burn more calories. The easy-to-hold vinyl handle won’t give you sore hands as you lift and swing and it’s an ideal weight for
