In 2019, the total number of gym memberships in the UK broke 10 million. LeisureDB reported that, in 2018, 1 in 7 UK citizens had a gym membership.
So, it would be natural to assume that gym retention should be higher than ever. However, this is not the case. Mintel estimates that 50% of gym members are being lost every year. This is probably due to the increasing prevalence of gyms, as well as gym alternatives.