Standing is not enough: A randomized crossover study on the acute cardiometabolic effects of variations in sitting in healthy desk work conditions
Randomized 5-hour crossover laboratory study (n=20 healthy young men): hourly 10-minute standing breaks or sitting on a stability ball did not significantly change postprandial insulin, glucose, or cortisol versus uninterrupted sitting after a mixed meal—small systolic BP differences only.
Design
- Crossover RCT; n = 20 healthy-weight males (~19 y)
- 5 h conditions after a standardised mixed meal: (1) office-chair sitting, (2) stability-ball sitting, (3) chair sitting with hourly 10-min standing breaks
- Outcomes: hourly insulin / glucose / cortisol; Nexfin haemodynamics; continuous HR; EMG during sitting vs standing
Primary metabolic result (abstract)
No significant differences in postprandial insulin, glucose, or cortisol across the three conditions—authors conclude hourly standing or ball-sitting, as tested, did not materially blunt acute cardiometabolic responses versus prolonged sitting in this cohort.
Secondary haemodynamic signals
SBP lower during standing-break periods; stroke volume lower on stability ball vs chair—differences small (~day-to-day variability magnitude per discussion).
Evidence hygiene
Healthy young men, single meal, acute window—do not negate free-living trials where light walking breaks improve glycaemia (post-meal walking protocol) or longer workplace interventions change risk markers.
Publication
Altenburg TM, Rotteveel J, Serne EH, et al. J Sci Med Sport. 2019 Jul;22(7):765-771. doi: 10.1016/j.jsams.2019.03.007. PMID 30651222.
Outcomes
- No significant difference in postprandial insulin, glucose, or cortisol between uninterrupted sitting, stability-ball sitting, and hourly 10-minute standing interruptions over 5 hours (n=20).
- Small systolic BP was lower during standing-interruption periods and stroke volume differed on stability ball versus chair; authors describe magnitudes as approximating day-to-day biological variability.