Lionel Messi trains with Miami's 'Glute Guy' - his wife Antonela's trainer - as he hits the gym a little more than two months before the start of the 2024 MLS season

Bret Contreras - a gym coach based in Miami - has his own Instagram and business account, @BootybyBretofficial, which is packed with advice to 'build your booty' and stay in shape.