Tough Endurance Workout from Chris Hinshaw and Sara Sigmundsdottir

“This track session got real really quick ‍♀️.”

• 4 sets
• 4 x 400 m with 40 seconds rest between reps 
• 4 min rest between sets

This track session got real really quick ‍♀️. 4 sets (4x400m w/ 40sec rest b/t reps & 4min rest b/t sets) @aerobiccapacity . . . @niketraining #niketraining #justdoit @FitAID #teamFitAID #FitAID #Ryourogue #roguefitness @compexusa #compexusa #musclestim #cfsudurnes #crossfit

A post shared by Sara Sigmundsdóttir (@sarasigmunds) on Jul 19, 2017 at 6:22pm PDT

More from Chris:

Chris Hinshaw: How to Build a Bigger Engine for Crossfit

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