PT - JOURNAL ARTICLE AU - J. A. White AU - A. H. Ismail AU - C. A. Bradley TI - Serum insulin and glucose response to graded exercise in adults. Part II. The effect of exercise conditioning. AID - 10.1136/bjsm.12.3.137 DP - 1978 Sep 01 TA - British Journal of Sports Medicine PG - 137--141 VI - 12 IP - 3 4099 - http://bjsm.bmj.com/content/12/3/137.short 4100 - http://bjsm.bmj.com/content/12/3/137.full SO - Br J Sports Med1978 Sep 01; 12 AB - The effect of conditioning to severe exercise upon serum immunoreactive insulin levels (IRI) and serum glucose concentrations (GC) was studied in active and sedentary groups of middle-aged men. The responses of serum IRI and serum GC were determined during graded cycle ergometer exercise which required similar low and high relative work intensities, before (pre) and after (post) a four month physical fitness programme. Both groups demonstrated a marked decline in serum IRI during high intensity exercise from pre to post tests, and a tendency to maintain serum, GC (sedentary group) or elevate serum GC (active group) during exercise, following the conditioning programme. The data provides evidence of a bi-directional response of serum IRI and serum GC to graded exercise, with only minor modifications in the response patterns resulting from exercise conditioning.