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. 2021 Apr 1;12:636997. doi: 10.3389/fphys.2021.636997

Table 6.

Thermoregulatory responses using cooling techniques.

Study Sample Climate Intervention/Exposure Duration Thermal measurement Methodological characteristics Outcome
Armstrong et al. (1995) 6 PA (C6-T12) 32.9 ± 0.1°C 75 ± 3% rh
30′ WC on stationary roller @ self-selected 10 km pace (67-70% VO2 peak)
DUR with headpiece or
DUR with IV
20-25′ rest in heat
30′ exercise
Tre
Tau
Tsk
Sweat rate
ThS
RCT cross-over No differences between tests in Tre, Tau, Tsk, sweat rate, ThS
Bongers et al. (2016) 10 M, PA (T4-T12) 25.4 ± 0.4°C
41.0 ± 8.4% rh
45′ arm cranking @ 50% peak power with
DUR with IV
10′ rest in heat
10′ WU
45′ test
5′ cool down
10′ rest in heat
Tin
Tsk
Fluid loss
ThS
RCT cross-over Tin no between test differences
Tsk mean ↓ with IV
ThS ↓ with IV
Fluid loss: no differences between tests
Griggs et al. (2017a) 1 F, TP
7 M, TP (C5-C7)
20.2 ± 0.2°C
33.0 ± 3.1% rh
4x 15′ intermittent sprint protocol 4x 15′ with different sprint bouts in 3 conditions No cooling
PRE with IV (incl. during WU)
PRE with IV and DUR with WS
15′ rest
20′ WU
4x 15′ exercise with 2′/5′/2′ rest in between
Tin
Tsk
ThS
Fluid loss
RCT cross-over ΔTin ↓ in PRE/DUR condition
Tsk mean ↓ in PRE/DUR condition
No differences between tests in ThS,fluid loss
Hagobian et al. (2004) 6 M, SCI (C5-T5)
6 M, AB
31.8 ± 0.2°C
26 ± 1% rh
45′ arm cranking @ 66 ± 5% VO2peak
DUR with foot cooling
30′ rest in heat
10′ rest in heat (baseline)
45′ exercise
30′ passive recovery
Ty
Tsk
RCT cross- over ΔTy ↑ in non-cooling
ΔTy ↑ in cooling compared to AB
Tsk face ↑ in SCI
Tsk back ↑ in SCI
Pritchett et al. (2010) 3 M, PA (T3-L1)
4 F, PA (T3-L1)
22 ± 1°C
45-50 ± 0.1% rh
Incremental stage test 7′/stage; start 30 W, increment 20 W, till Tes rose more 0.2°C/min or 90 W
DUR with WS
7′ each stage
1′ in-between passive recovery
Teso
Tre
Tsk
ThS
RCT cross-over No differences between tests in in Tre, Tsk, ThS, Teso
Trbovich (2019) 1 TP
1 PA
1 AB
75°F control
90°F hot
30′ WC treadmill
5 different conditions: control, hot, hot with IV, hot with WS, hot with ice slurry
10′ rest
30′ treadmill
Tin RCT cross-over All three cooling interventions mitigated the rise in Tin in TP WS and ice slurry mitigated the rise in PA
Trbovich et al. (2014) 6 TP (C5-C7)
5 PA, (T3-T5)
6 PA, (T7-T12)
19 AB
21.1–23.9°C Playing WC basketball or rugby
DUR with IV
Without cooling
20′ rest
60′ exercise
Tin RCT cross-over Tin ↑ in TP than PA, AB
No between test differences in Tin for any group or condition
Trbovich et al. (2019) 7 TP (C5-C7) 4 PA (T4–L1)
16 AB
19-22°C 55-60% rh 90′ intermittent sprint exercise under two conditions DUR with WS application every 15′ without cooling TP played WC rugby PP played WC basketball 15′ WU
60-90′ WC basketball or rugby
Tin RCT cross-over ΔTin ↑ in TP than PA, AB ΔTin ↓ in TP with WS
Webborn et al. (2005) 8 M, TP (C5-C7) 32.0 ± 0.1°C
50.0 ± 0.1% rh
14x 2′ intermittent sprint protocol arm cranking
PRE with IV
DUR with IV
15′ rest in temperate
20′ IV or rest in thermal neutral
7′ WU
14x 2′ exercise
Tin
Tsk
ThS
RCT cross-over Tin ↑ without cooling
ΔTin ↓ lower in DUR than other conditions
Tsk ↓ with DUR than control
ThS no differences between tests
Webborn et al. (2010) 8 M, TP (C5-C7) 32.0 ± 0.1°C
50.0 ± 0.1% rh
30x 2′ intermittent sprint protocol arm cranking
PRE with IV
DUR with IV
15′ rest in thermal neutral
20′ IV or rest in thermal neutral
7′ WU
Up to 30x 2′ exercise
Tc
Tsk
Performance
RCT cross-over Tin ↑ without cooling
Tsk ↓ with DUR than control
Performance ↑ with PRE than control
Performance ↑ with DUR than PRE

M, male; F, female; AB, able-bodied; PA, paraplegic; TP, tetraplegic; SCI, spinal cord injury; C, cervical; T, thoracic; L, lumbar; WC, wheelchair; °C, degree Celsius; °F, degree Fahrenheit; rh, relative humidity; WU, warm-up; Tre, rectal temperature; Teso, esophageal temperature; Tsk, skin temperature; Tint, intestinal temperature; Ty, tympanic temperature; Tau, aural temperature; ThS, thermal sensation; HR, heart rate; RCT, randomized controlled trial; nRnCT, non-randomized non-controlled trial; W, watt; Pmax = maximal power output; ↑ = higher; → = indifferent; ↓ = lower; DUR = cooling during exercise; PRE = cooling before exercise; IV = ice vest/cooling vest; WS = water spray.