HIIT indoor cycling workout: Over/under threshold intervals to improve endurance

Join in with this tough 35-minute over/under threshold cycling session for anyone who wants to replicate race efforts and improve their endurance.
Manon’s got a savage over/unders workout for you to replicate race efforts and improve endurance. Over/unders are alternating efforts above and below threshold. There are eight 90-second efforts followed by a short break then repeated all over again. As Manon says, if you’re not sweating buckets, you’re doing it wrong!

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