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Spare Cycles

Jem Arnold

Category: Performance Assessment

CoreTemp Heat Accumulation Test

I have been experimenting for the last few weeks with the CORE BodyTemp sensor. This solid little device estimates core temperature from measuring thermal energy transfer at the skin. The CORE development team recently posted a 'heat ramp test', which I'm calling a 'Heat Accumulation protocol' because it involves more than just a ramp test.

Jem Arnold Performance Assessment 1 Comment January 5, 2021January 7, 2021 13 Minutes

Internal Training Load Measurement with Muscle Oxygenation

A recent finding in our research with Moxy muscle oxygenation was looking at the reliability & repeatability of muscle oxygen saturation (SmO2) compared to heart rate for a typical high intensity interval workout. We had a group of well-trained male subjects (VO2max > 60 ml/kg/min) perform a series of 4x4min high intensity

Jem Arnold Performance Assessment 8 Comments June 11, 2020January 7, 2021 6 Minutes

Speculating on Physiology in the Lab vs on the Road

For this experiment we wanted to look at physiological response to the same workout in the LAB vs in the FIELD. It's fascinating! There are a lot of conflicting and equivocal findings, ultimately suggesting that there is a high degree of individual variability in how each of us produce power across modalities and conditions.

Jem Arnold Performance Assessment 5 Comments December 26, 2019January 7, 2021 10 Minutes

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Recent Popular Posts

  • Why Perform Hard-Start VO2max Intervals?
  • CoreTemp Heat Accumulation Test
  • 2017 Training Part 3 - VO2max
  • Discussing FTP and TTE
  • Investigating Power Asymmetry using Pedaling Metrics

My name is Jem Arnold

I write about physiology and endurance training optimization, usually with an applied focus.

I’m a (brand new!) PhD student, Physiotherapist, and coach. I try to integrate ideas from the perspective of an athlete, health professional, coach, researcher, and especially as a curious enthusiast who just wants to listen to and learn from the smartest people in whatever conversation I’m a part of.

Everything written is my own inexpert opinion. My current opinions will most certainly change as I continue to learn. Nothing written constitutes personal medical or physiotherapy advice.

Email me at jem@sparecycles.blog

Recent Posts

  • CoreTemp Heat Accumulation Test
  • Why Perform Hard-Start VO2max Intervals?
  • Call For Participants (still open!)
  • Workload, Intensity, and VO2max Trainability
  • Muscle Oxygenation Overview
  • Internal Training Load Measurement with Muscle Oxygenation
  • Speculating on Physiology in the Lab vs on the Road
  • Comparing VO2 Master Pro to TrueOne 2400 – Part 2
  • Comparing VO2 Master Pro to TrueOne 2400 – Part 1
  • Surgery Race Report
  • Modeled VO2 During Ramp Tests and Intervals
  • Metabolic Steady State – Inside vs Outside
  • Deriving Power from VO2 and VO2 from Power
  • VO2 Measured to Modeled
  • Comparing 30/15 VO2max Intervals
  • More Comparisons for Hard-Start VO2max
  • Comparing Metabolic Response to Hard-Start VO2max Intervals
  • VO2 Master Pro & Moxy – Revealing Metabolic Limitation – Part 2
  • VO2 Master Pro & Moxy – Revealing Metabolic Limitation – Part 1
  • Comparing Steady Power to Decreasing Power
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