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Ironamn 70.3 Run economy Block


Mike Bridge

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8 Weeks

Plan Specs

triathlon half ironman intermediate pace based tss based

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Plan Description

A short block of work designed to be used in the off season or preparation phase to develop run economy. Both bike and swim disciplines are put into maintenance mode whilst the run is prioritised.
The block utilises vV02 training to develop run economy and improve speed and endurance at all intensity levels. The hard sessions in this block at very hard and therefore the easy runs and bikes need to be kept at a very low intensity to allow adequate recovery.
The use of a running track would be advantageous for the run sessions.
Whilst the plan can be used be used by any athlete to develop running economy over any distance it is ideally suited to 70.3 or Olympic distance athletes. It would be ideal to complete this block several times in the pre season with bike and swim specific blocks inserted between each run focus.
To get guidance or help with this plan see:


Average Weekly Breakdown

Workouts Weekly Average Longest Workout
3:43 hrs 1:30 hrs
1:41 hrs 1:00 hrs
2:29 hrs 2:04 hrs
0:46 hrs 1:38 hrs
Workouts Per Week Weekly Average Longest Workout
3:43 hrs 1:30 hrs
1:41 hrs 1:00 hrs
2:29 hrs 2:04 hrs
0:46 hrs 1:38 hrs

Training Load By Week

Mike Bridge


Swimming technique improvement, Triathlon racing and skills, training program design

We provide a range of un-coached and comprehensive coaching options ranging from £30-£80 per month.

Sample Day 1

vV02 max test

This test is designed to establish your vV02 pace (see for more info.). Make sure that you can record the distance you cover accurately (to within 3m).
A running track is the best location for this test, but a flat firm circuit will suffice.
Your vV02 pace is the average pace you sustain for the 6 minutes and you will conduct most of your hard intervals at this pace.

Sample Day 1

race start stimulus

Sample Day 2

building 1000s 3000m new

This is a swim endurance set so keep early reps comfortable as finishing strongly is important.
If you cannot complete 3000 in 1hr do same sets but with 750m or extend time allowed.

Sample Day 3

long run

Keep this Steady. You should be able to eat and/or talk for the entire distance.
A rolling hilly route is best.

Sample Day 4

2x30min over/under

Maintain a TT position throughout. Focus on staying aero and keeping pedalling smooth. Allow HR to climb gradually through the 2 minutes, try not to accelerate hard at the start then fade.

Sample Day 6

vV02 session 60/60 new

vV02 session best completed on a running track. However a road loop (housing estate etc) that allows fast running will be fine. Much of the time at V02 max occurs during the recovery so make sure you keep to a consistent pace in the recovery throughout the effort.
Initially running at you 1 mile P.B pace will feel comfortable, but by about half way it will really hurt, so keep pushing.

Sample Day 7


2 ride @ zone2 or 6/10 rpe

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