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My journey to health and wellbeing - July 2017 - to date

Fitness tips, Relaxation, Mind and Body
tikunetih
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Re: My journey to health and wellbeing - July 2017 - to date

#243584

Postby tikunetih » August 11th, 2019, 5:27 pm

Snorvey wrote:Ever decreasing rewards....

A year ago, a one hour rowing session would burn 120 more calories than it did today.



How's the work being calculated?

As you get fitter, you should be able to perform more work per unit of time.

Snorvey
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Re: My journey to health and wellbeing - July 2017 - to date

#243609

Postby Snorvey » August 11th, 2019, 7:03 pm

tikunetih wrote:
Snorvey wrote:Ever decreasing rewards....

A year ago, a one hour rowing session would burn 120 more calories than it did today.



How's the work being calculated?

On my fitbit.

As you get fitter, you should be able to perform more work per unit of time.[


I have to pace myself on an hour long session - I want to be able to make it to the end! So it's likely I'm not going as hard as I could, although I'm covering more distance (as calculated by the rowers computer).

tikunetih
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Re: My journey to health and wellbeing - July 2017 - to date

#243614

Postby tikunetih » August 11th, 2019, 7:28 pm

Snorvey wrote:
tikunetih wrote:
Snorvey wrote:Ever decreasing rewards....

A year ago, a one hour rowing session would burn 120 more calories than it did today.



How's the work being calculated?

On my fitbit.

As you get fitter, you should be able to perform more work per unit of time.[


I have to pace myself on an hour long session - I want to be able to make it to the end! So it's likely I'm not going as hard as I could, although I'm covering more distance (as calculated by the rowers computer).


The fitbit's using HR & weight presumably?

The "more work" question I suppose comes down the whether the greater distance travelled more than offsets the lower mass being moved (or maybe the distance cal already takes account of mass?). My strong guess is that for a given intensity of perceived effort you'll be doing more work, ie burning more calories, now than when you began and were less fit, and that the fitbit number is misleading. One of the bonuses of getting fitter (become more powerful) is being able to burn more calories in a workout.

This is the standard pattern seen with bike turbo trainers (where the work done can be measured accurately via a power meter rather than relying on a proxy like HR with lookup tables).

If you have access to a time machine then you could do a 1hr test on your mate's C2 (if that's got power measurement?) back when you were unfit and compare to a similar test now!

Snorvey
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Re: My journey to health and wellbeing - July 2017 - to date

#243793

Postby Snorvey » August 12th, 2019, 4:02 pm

The fitbit's using HR & weight presumably?

Yes, using the Fitbits Heartrate monitor. Mt weight is updated regularly manually on the Fitbit. My wife suggested it took less calories to shift 11 stone than it did to shift 15+stone, which I guess sounds reasonable.

Anyway, here's a couple of 'before and after' rowing readouts for you all

Before:
14th of February 2018 (about 6 months after I got the rower and a couple of weeks or so after I got the Fitbit)
Basically, just trying to get to the end of a 30 minute session. 2 x longish breaks where I had to regain consciousness after a cardiac arrest.

Image

After:
6th of August 2019. The first 30 minutes were at around 70-80 watts constant and 26-27 strokes per minute. The rest of the session was made up of short 110 watts+ sessions with a 60 second rest in between.

Image


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