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Aerobic Substitutions

This page provides a guide to potential workout substitutions within the daily training program. Typically, our standard programming includes three types of aerobic exercises: distance running (100m, 200m, 400m etc), shuttle runs, and single unders. If you have access to cyclical machines like rowing machines, you’re invited to substitute them using the chart below.

Run

(meters)

Shuttle Run*

(reps)

Single Unders

(reps)

Row

(meters)

Time

(min/sec)

100

4

75

125

0:30

200

8

150

250

1:00

400

16

300

500

2:00

600

24

450

750

3:00

800

32

600

1000

4:00

10000

40

750

1250

5:00

*The prescribed distance for one repetition of the shuttle run is 50 feet (15.24 meters), consisting of running 25 feet (7.62 meters) down and 25 feet (7.62 meters) back.


If equipment, physical ability, or skill constraints prevent you from performing any of the above substitutions, refer to the time column. It shows the recommended duration of aerobic activity based on other metrics. Simply choose an aerobic exercise you can do for the specified duration. For instance, if running isn’t feasible, toe taps, running in place, high knees, or running stairs could be viable alternatives.


Double Under Substitutions


Different training programs suggest doubling or tripling single unders as a substitute for double unders. In our program, we recommend a 50% increase (1.5 times the double unders) to maintain the workout’s energy system focus. Using a higher rep count might disrupt the purpose of a workout. For example, if a 3-minute interval workout requires 100 double unders and 20 deadlifts, tripling the count of single unders might cause you to spend the entire interval on them, detracting from the workout’s intention.


For double under substitutions like jumping jacks, we recommend keeping the same rep count. Given the similar energy expenditure due to arm and leg movements, the number of reps should be equal. Pogo jumps and line hops typically follow the same rule as single unders—a 50% increase—although line hops demand slightly more energy per rep. However, don’t obsess over these numbers. These are skill movements and the ideal substitution will vary based on individual jumping ability, ankle strength, plyometric endurance, etc.


Double Unders

Jumping Jacks

Single Unders

Line Hops

Pogo Jumps

10

10

15

15

15

20

20

30

30

30

30

30

45

45

45

40

40

60

60

60

50

50

75

75

75

60

60

90

90

90

100

100

150

150

150

Please note, if you’re unable to perform double unders, don’t use the conditioning workout as practice time. Instead, use any of the mentioned alternatives. If learning the skill is important to you, practice double unders outside of the conditioning workout for better long-term progress.

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