title: Sprint interval training (SIT) is an effective method to maintain cardiorespiratory fitness (CRF) and glucose homeostasis in Scottish adolescents.
abstract: The present study examined the physiological impact of a school based sprint interval training (SIT) intervention in replacement of standard physical education (SPE) class on cardio-respiratory fitness (CRF) and glucose homeostasis during the semester following summer vacation. Participants (n=49) were randomly allocated to either intervention (SIT; n=26, aged 16.9 ± 0.3 yrs) or control group who underwent standard physical education (SPE; n=23, aged 16.8 ± 0.6 yrs). CRF (VO2max) and glucose homeostasis were obtained prior-to and following 7 weeks of SIT exercise. Significant group x time interaction was observed for CRF (P < 0.01) with non-significant trends for fasting insulin (P= 0.08), and HOMA-IR (P=0.06). CRF decreased (P < 0.01) in SPE such that POST intervention CRF was significantly lower (P< 0.05) in SPE. Fasting plasma glucose (P < 0.01), insulin (P< 0.01) and HOMA-IR (P< 0.01) increased significantly amongst SPE. The main finding of the present study is that 7-weeks of SIT exercise is an effective method of maintaining (but not improving) CRF and fasting insulin homeostasis amongst school-going adolescents. SIT exercise demonstrates potential as a time efficient physiological adjunct to standard PE class in order to maintain CRF during the school term.
authors.affiliation: Institute of Clinical Exercise and Health Science, School of Sport & Science, University of the West of Scotland Hamilton, South Lanarkshire, Scotland, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Martin
authors.affiliation: Institute of Clinical Exercise and Health Science, School of Sport & Science, University of the West of Scotland Hamilton, South Lanarkshire, Scotland, United Kingdom.
authors.forename: D S
authors.initials: DS
authors.lastname: Buchan
authors.affiliation: Institute of Clinical Exercise and Health Science, School of Sport & Science, University of the West of Scotland Hamilton, South Lanarkshire, Scotland, United Kingdom.
authors.forename: J S
authors.initials: JS
authors.lastname: Baker
authors.affiliation: Institute of Clinical Exercise and Health Science, School of Sport & Science, University of the West of Scotland Hamilton, South Lanarkshire, Scotland, United Kingdom.
authors.forename: J
authors.initials: J
authors.lastname: Young
authors.affiliation: Institute of Clinical Exercise and Health Science, School of Sport & Science, University of the West of Scotland Hamilton, South Lanarkshire, Scotland, United Kingdom.
authors.forename: N
authors.initials: N
authors.lastname: Sculthorpe
authors.affiliation: Institute of Clinical Exercise and Health Science, School of Sport & Science, University of the West of Scotland Hamilton, South Lanarkshire, Scotland, United Kingdom.
authors.forename: F M
authors.initials: FM
authors.lastname: Grace
keywords: adolescents; cardio-respiratory fitness (CRF); sprint interval training (SIT)