The best exercise balls 2020: the best options for strength and flexibility

By Tech Radar
Theraband Pro Series Exercise Ball
"Bouncy and firm, the best exercise ball for all activities"
Gymnic Fit Ball
"A softer exercise ball that's a good choice for flexibility work"
Gaiam Total Body Balance Ball
"A good all-rounder that comes up a little small, but performs well"
TRX Stability Ball
"A super sturdy exercise ball with a clever design"
Bosu Ballast Ball
"Plenty of grip, but the ballast restricts fluid movements"