Methods to Identify the Lactate and Glucose Thresholds During Resistance Exercise for Individuals With Type 2 Diabetes

• Published in: Journal of strength and conditioning research Vol. 22; no. 4; pp. 1108 - 1115
• Main Authors: Moreira, Sérgio R, Arsa, Gisela, Oliveira, Hildeamo B, Lima, Laila C J, Campbell, Carmen S G, Simões, Herbert G
• Format: Journal Article
• Language: English
• Published: United States National Strength and Conditioning Association 01-07-2008; Lippincott Williams & Wilkins Ovid Technologies
• Subjects: Blood Glucose - analysis; Blood pressure; Body Weight; Data collection; Diabetes; Diabetes Mellitus, Type 2 - blood; Exercise; Exercise Test; Humans; Hyperglycemia; Lactic Acid - blood; Male; Methods; Middle Aged; Studies
• ISSN: 1064-8011; 1533-4287
• DOI: 10.1519/JSC.0b013e31816eb47c

Moreira, SR, Arsa, G, Oliveira, HB, Lima, LCJ, Campbell, CSG, Simões, HG. Methods to identify the lactate and glucose thresholds during resistance exercise for individuals with type 2 diabetes. J Strength Cond Res 221108-1115, 2008-The purpose of this study was to compare different methods to identify the lactate threshold (LT) and glucose threshold (GT) on resistance exercise for individuals with type 2 diabetes. Nine men with type 2 diabetes (47.2 ± 12.4 years, 87.6 ± 20.0 kg, 174.9 ± 5.9 cm, and 22.4 ± 7.2% body fat) performed incremental tests (ITs) on the leg press (LP) and bench press (BP) at relative intensities of 10, 20, 25, 30, 35, 40, 50, 60, 70, 80, and 90% of one-repetition maximum (1RM) at each 1-minute stage. During the 2-minute interval between stages, 25 μl of capillary blood were collected from the earlobe for blood lactate [Lac] and blood glucose [Gluc] analysis (YSI 2700S). The LT in the LP and BP was identified at IT by the inflexion in [Lac] response as well as by an equation originated from a polynomial adjustment (LTp) of the [Lac]/% 1RM ratio responses. The lowest [Gluc] during the IT identified the GT. The analysis of variance did not show differences among the 1RM at the thresholds identified by different methods in the LP (LTLP = 31.0% ± 5.3% 1RM; GTLP = 32.1% ± 6.1% 1RM; LTpLP = 36.7% ± 5.6% 1RM; p > 0.05) and BP (LTBP = 29.9% ± 8.5% 1RM; GTBP = 32.1% ± 8.5% 1RM; LTpBP = 31.8% ± 6.7% 1RM; p > 0.05). It was concluded that it was possible to identify the LT and GT in resistance exercise by different methods for individuals with type 2 diabetes with no differences between them. The intensities (kg) corresponding to these thresholds were between 46% and 60% of the body weight on the LP and between 18% and 26% of the body weight on the BP, in which the exercise prescription would be done to this intensity in 3 sets of 20 to 30 repetitions each and 1 minute of rest while alternating the muscle groups for blood glucose control for individuals with characteristics similar to the participants.