Characterising the application of the “progressive overload” principle of exercise training within cardiac rehabilitation: a United Kingdom-based community programme (2020)
Journal Article
Khushhal, A., Nichols, S., Carroll, S., Abt, G., & Ingle, L. (in press). Characterising the application of the “progressive overload” principle of exercise training within cardiac rehabilitation: a United Kingdom-based community programme. PLoS ONE, 15(8), Article e0237197. https://doi.org/10.1371/journal.pone.0237197

BACKGROUND: Recent concerns have cast doubt over the effectiveness of cardiac rehabilitation [CR] programmes for improving cardiorespiratory fitness [CRF] in patients with a history of cardiac disease in the United Kingdom [UK]. We aimed to character... Read More about Characterising the application of the “progressive overload” principle of exercise training within cardiac rehabilitation: a United Kingdom-based community programme.

Letter to the editor regarding the article “Walking cadence required to elicit criterion moderate-intensity physical activity is moderated by fitness status” by Abt et al. (2019) (2019)
Journal Article
Abt, G., Bray, J., Myers, T., & Benson, A. (2020). Letter to the editor regarding the article “Walking cadence required to elicit criterion moderate-intensity physical activity is moderated by fitness status” by Abt et al. (2019). Journal of sports sciences, 38(3), 306-307. https://doi.org/10.1080/02640414.2019.1697485

Insufficient exercise intensity for clinical benefit? Monitoring and quantification of a community-based Phase III cardiac rehabilitation programme: A United Kingdom perspective (2019)
Journal Article
Khushhal, A., Nichols, S., Carroll, S., Abt, G., & Ingle, L. (in press). Insufficient exercise intensity for clinical benefit? Monitoring and quantification of a community-based Phase III cardiac rehabilitation programme: A United Kingdom perspective. PLoS ONE, 14(6), Article e0217654. https://doi.org/10.1371/journal.pone.0217654

Abstract: Background: In recent years, criticism of the percentage range approach for individualised exercise prescription has intensified and we were concerned that sub-optimal exercise dose (especially intensity) may be in part responsible for the... Read More about Insufficient exercise intensity for clinical benefit? Monitoring and quantification of a community-based Phase III cardiac rehabilitation programme: A United Kingdom perspective.

Pilot study assessing the influence of skin type on the heart rate measurements obtained by photoplethysmography with the Apple Watch (2019)
Journal Article
Abt, G., De Hoyo, M., Muñoz-López, A., Perry, J., & Sañudo, B. (2019). Pilot study assessing the influence of skin type on the heart rate measurements obtained by photoplethysmography with the Apple Watch. Journal of Medical Systems, 43(7), Article 195. https://doi.org/10.1007/s10916-019-1325-2

Photoplethysmographic imaging (PPG) is currently used to measure heart rate (HR) and the accuracy of PPG can be influenced by pigmentation of the skin; however, the effects of skin color-related artifacts on PPG during exercise remain unclear. This s... Read More about Pilot study assessing the influence of skin type on the heart rate measurements obtained by photoplethysmography with the Apple Watch.

Walking cadence required to elicit criterion moderate-intensity physical activity is moderated by fitness status (2019)
Journal Article
Abt, G., Bray, J., Myers, T., & Benson, A. C. (2019). Walking cadence required to elicit criterion moderate-intensity physical activity is moderated by fitness status. Journal of sports sciences, 37(17), 1989-1995. https://doi.org/10.1080/02640414.2019.1612505

The aims of this study were to estimate the walking cadence required to elicit a VO2reserve (VO2R) of 40% and determine if fitness status moderates the relationship between walking cadence and %VO2R. Twenty participants (10 male, mean(s) age 32(10) y... Read More about Walking cadence required to elicit criterion moderate-intensity physical activity is moderated by fitness status.

Measuring Moderate-Intensity Exercise with the Apple Watch: Validation Study (2018)
Journal Article
Abt, G., Bray, J., & Benson, A. C. (in press). Measuring Moderate-Intensity Exercise with the Apple Watch: Validation Study. JMIR Cardio, 2(1), e6. https://doi.org/10.2196/cardio.8574

Background: Moderate fitness levels and habitual exercise have a protective effect for cardiovascular disease, stroke, type 2 diabetes, and all-cause mortality. The Apple Watch displays exercise completed at an intensity of a brisk walk or above usin... Read More about Measuring Moderate-Intensity Exercise with the Apple Watch: Validation Study.

The validity and inter-device variability of the Apple Watch™ for measuring maximal heart rate (2017)
Journal Article
Abt, G., Bray, J., & Benson, A. C. (2018). The validity and inter-device variability of the Apple Watch™ for measuring maximal heart rate. Journal of sports sciences, 36(13), 1447-1452. https://doi.org/10.1080/02640414.2017.1397282

Maximal heart rate (HRmax) is a fundamental measure used in exercise prescription. The Apple Watch measures heart rate yet the validity and inter-device variability of the device for measuring HRmax are unknown. Fifteen participants completed a maxim... Read More about The validity and inter-device variability of the Apple Watch™ for measuring maximal heart rate.

Validity and reliability of the Apple Watch for measuring heart rate during exercise (2017)
Journal Article
Khushhal, A., Nichols, S., Evans, W., Gleadall-Siddall, D., Page, R., O'Doherty, A. F., …Abt, G. (2017). Validity and reliability of the Apple Watch for measuring heart rate during exercise. SMIO / Sports Medicine International Open, 1(6), E206-E211. https://doi.org/10.1055/s-0043-120195

We examined the validity and reliability of the Apple Watch heart rate sensor during and in recovery from exercise. Twenty-one males completed treadmill exercise while wearing two Apple Watches (left and right wrists) and a Polar S810i monitor (crite... Read More about Validity and reliability of the Apple Watch for measuring heart rate during exercise.