Anaerobic Threshold Workout
Pyramids.
Here you will aim for rate increases at smaller intervals to a tipping point, then reduce again.
o 3 x 29 minutes (rate change at 5′, 4′, 3′, 2′, 1′, 2′, 3′, 4, 5′), 5 minutes rest.
o 4 x 11 minutes (rate change at 3′, 2′, 1′, 2′, 3′), 3 minutes rest.
o 5 x 2000 meters (change rate every 500 meters), 3 minutes rest.
o 4 x 2500 meters (change rate every 500 meters), 3 minutes rest.
o 3′ on/3′ off, 4′on/4′off, 5′on/5′off, 4′on/4′off, 3′on/3′off
Staircasing. Here your rate increases with regular gradations
o 4 x 10 minutes (rate increases every 2 minutes), 3 minutes rest.
o 2 x 24 minutes (18, 20, 22, 24, 20, 22, 24, 26 with rate changing every 3 minutes), 4 minutes rest.
o 5 x 2000 meters (rate increases every 500 meters), 3 minutes rest.
o 4 x 2500 meters (rate increases every 500 meters), 4 minutes rest.
Castles. These mix it up a little for you with both rate increases and decreases at regular intervals.
o 3 x 20 minutes (rate alternates between a high rate and low rate every 2 minutes), 3 minutes rest.
o 3 x 18 minutes (rate alternates between a high rate and low rate every 2 minutes), 3 minutes rest.
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