Finger anthropometrics may not be a primary influence on the thermal responses to cooling and rewarming

Figures & data

Figure 1. Representative trace of finger temperature (T_finger) data throughout the experimental protocol along with time windows for cooling and rewarming analysis.

Table 1. Anthropometric characteristics of the digits of the fingers (n = 15).

Anthropometric Variable	Digit of the Hand
	Second Digit	Third Digit*	Fourth Digit*	Fifth Digit
Length (cm)	7.4 ± 0.2	8.1 ± 0.2	7.4 ± 0.2	6.0 ± 0.2
Circumference (cm)	6.0 ± 0.1	5.9 ± 0.1	5.6 ± 0.1	5.0 ± 0.1
Surface Area (cm^2)	655.2 ± 16.7	707.9 ± 19.0	607.2 ± 15.1	448.3 ± 17.4
Volume (cm^3)	21.2 ± 0.7	22.6 ± 0.8	18.2 ± 0.6	12.1 ± 0.6

*Third and fourth digits used for both temperature and blood flux analyses.

Figure 2. Thermal responses of the pooled digits during the first 5 minutes of cold water immersion. A) average finger temperature (T_finger) (p = 0.05; R² = 0.06); B) average laser-Doppler fluxmetry (LDF); C) area under the curve (AUC) for T_finger (n = 59 for T_finger) (p = 0.05; R² = 0.07); D) AUC for LDF (n = 30 for LDF).

Figure 3. Thermal responses of the pooled digits during 10 minutes of rewarming. A) average finger temperature (T_finger); B) average laser-Doppler fluxmetry (LDF); C) area under the curve (AUC) for T_finger (n = 59 for T_finger); D) AUC for LDF (n = 30 for LDF).