Season 7 Episodes21
Cast3

Bob Harper
Self

Alison Sweeney
Self - Host

Jillian Michaels
Self
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Ranked #17 of 19 in Season 7•−0.3 vs season avg
This week, the contestants hike up a hill to find over 100 keys, but only two teams will find the keys that unlock the Biggest Loser gym. The rest of the teams have to learn to creatively work out all week without the use of

Bob Harper
Self

Alison Sweeney
Self - Host

Jillian Michaels
Self
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"Gym Keys" is episode 7 of The Biggest Loser season 7. It scored 6.6/10 from 11 votes, ranking #17 of 19 episodes this season (season average 6.9). It aired on February 17, 2009.