Trial reportMedicine and science in sports and exercise2026
Postural Instability Is Greater in Men with Type 2 Diabetes after Exertional Heat Stress.
Trial report in Medicine and science in sports and exercise, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
purposeIndividuals with type 2 diabetes (T2D) face a greater risk of heat-related illness during exercise compared to healthy counterparts. Here, we examined how T2D affects thermoregulation and postexercise postural sway in cool and warm-humid environments.
methodsMiddle-aged men with ( n = 15, age: 58 ± 5 yr, : 31 ± 6 mL · kg -1 · min -1 ) and without T2D (CON) ( n = 15, age: 58 ± 4 yr, : 34 ± 6 mL · kg -1 · min -1 ) walked for an hour at 6.0 W · kg -1 in 22°C, 50%RH (COOL) and 32°C, 70%RH (WARM) in a randomized counterbalanced crossover design. Gastrointestinal temperature (T gi ), skin temperatures (T sk ), heart rate, and whole-body sweat rate were assessed in this study. Postural balance (i.e., center of pressure [COP] excursions), handgrip strength and five-time sit-to-stand performance were assessed pre- and postexercise.
resultsMen with T2D showed greater increase in postural instability, particularly when balancing on an unstable surface after WARM compared to COOL, despite similar postexercise T gi , T sk , HR, and whole-body sweat rate between groups. Anteroposterior COP (WARM > COOL: +9 mm [95% CI: 3-15 mm], d = 0.86, P = 0.037); total COP excursion (WARM > COOL: +126 mm [95% CI: 48-204 mm], d = 0.87, P = 0.018), and COP mean velocity (WARM > COOL: +5 mm · s -1 [95% CI: 2-7 mm · s -1 ], d = 1.49, P = 0.003) were increased only in men with T2D in WARM.
conclusionsPostural instability increased only in middle-aged men with T2D in humid heat, despite comparable thermoregulatory responses with age-matched men without T2D. This may be attributed to T2D-associated impairments (e.g., altered hemodynamics and/or vibrotactile sensitivity) which can lead to an increased fall risk during or after exercise in the heat.
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