Garmin Edge 1000 bike computer
Garmin Edge 1000 bike computer
Training > Beginners

Training: the 3 most valuable metrics triathletes should measure

New to triathlon and finding yourself bombarded with information about training and what to measure: power, speed, distance, cadence, stroke count and so on. Joe Beer explains the three most important measurables.

1 HEART RATE WHILE TRAINING

Published data and diaries of age-group and elite endurance athletes reveal that at least 75-80% of your training volume must be below 80% of your maximum heart rate. This is more important than cadence measurement, stroke count and so on. So using a heart rate monitor on the bike and while running, to ensure that you execute the correct type of training session that your plan requires, is very important.

Best heart rate zones for running

Best heart rate training zones for cycling

Using heart rate variability to optimise triathlon training

Heart-rate variability: what it is and why you should measure it

  

2 RAW RACE ABILITY

Your actual raw ability to swim, bike and run in a time trial is important so you can see if you’re getting faster. This could be a 500-750m swim time trial, a 16-19km bike and a 5-8km run, on separate occasions. Doing this year round, at 6-8 week intervals, gauges actual effectiveness of training or how your form may be dropping in the off-season.

3 SPORT-SPECIFIC METRICS

There are several key factors to measure in each sport to see if you’re training the muscles correctly and becoming as efficient as you can. 

In swimming it would be measuring your ability in terms of strokes per length to see how much water you’re effectively pulling yourself through. This is cheap, simple to do and also allows you to see the point at which swimming speed starts to affect your stroke efficiency to the detriment of swim execution and the ability to exit into T1. 

On the bike, power (measured in watts) is the key metric – but this may be too expensive a measure for many. Cadence in triathlon is optimally around 80-90rpm and this should be watched more than speed. Muscle tension at low revs (5min intervals at 55rpm uphill) focuses on the pushing down phase and will improve strength. Higher frequencies (20min blocks at 95-100rpm soft spinning) give the legs a higher ‘bandwidth’ to make race cadence easier. 

How to interpret data to see if you're performance is improving

  

Running is probably best assessed by how long it takes to do a 1-mile flat course at 80% of your maximum HR, and this may be improved by dropping excess weight. So get an HR monitor, count strokes on the swim, on the bike measure cadence and when running assess efficiency. 

There are now also running power meters being developed, notably the Stryd run power meter, that will show you time, distance, pace, heart rate and running wattage, when paired with your phone. It also can be paired with a number of watches.

Bike power meters for triathletes: what to know

10 of the best bike computers

Garmin Edge bike computers: buyer’s guide to all the models

Triathlon multisport watches: 6 of the best reviewed

What's the difference between average power and normalised power on the bike?


 
 

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