Physical workload and cardiopulmonary parameters in relation to individual capacity of bulk waste workers – a cross-sectional field-study

Table 5 The differences between markers of physical strain and the recommended limits for prolonged occupational work [3, 17]

n = 14		mean	SD	median	min	max	p^*
RHR_shift-RHR_shift,rec	[%HRR]	11.2	8.7	10	-3.2	27.4	0.0014
RHR_C-RHR_C,rec	[%HRR]	6.9	9.4	5.2	-8.9	26.6	0.034
RAS_shift-RAS_shift,rec	[%V̇O_2,max]	14.7	9.5	12.8	1.2	30.4	0.0004
RAS_C-RAS_C,rec	[%V̇O_2,max]	15.7	10.2	17	0.6	30.9	0.0004
\({\overset{\boldsymbol.}{\mathbf V}\mathbf O}_{\mathbf2\boldsymbol,\mathbf s\mathbf h\mathbf i\mathbf f\mathbf t}\boldsymbol-{\overset{\boldsymbol.}{\mathbf V}\mathbf O}_{\mathbf2\boldsymbol,\mathbf V\mathbf T\mathbf1}\)	[ml/min]	-491	382	-482	-1299	196	0.0015
\({\overset{\boldsymbol.}{\mathbf V}\mathbf O}_{\mathbf2\boldsymbol,\mathbf C}\boldsymbol-{\overset{\boldsymbol.}{\mathbf V}\mathbf O}_{\mathbf2\boldsymbol,\mathbf V\mathbf T\mathbf1}\)	[ml/min]	-159	390	-140	-936	493	0.152

RHR_shift Individual mean relative heart rate (RHR) during T_shift, RHR_shift,rec The calculated maximum recommended RHR for T_shift [17], RHR_C Individual RHR during T_C, RHR_C,rec The calculated maximum recommended RHR for T_C [17], RAS_shift Individual mean relative aerobic strain (RAS) during T_shift, RAS_shift,rec The calculated maximum recommended RAS for T_shift [17], RAS_C Individual RAS during T_C, RAS_C,rec The calculated maximum recommended RAS for T_C [17], \({\overset.VO}_{2,shift}\) Individual mean oxygen consumption \((\mathrm{\overset{.}{V}O}_2)\) during the individual shift, \({\overset.VO}_{2,VT1}\) Individual oxygen consumption at ventilatory threshold (VT1), \({\dot{V}O}_{2,C}\) Individual mean \(\mathrm{\overset{.}{V}O}_2\) during the individual total time collecting manually bulky waste from the premises of the customer summed over the duration of T_shift (T_C), SD Standard deviation
^*The shown p-values are adjusted for multiple comparisons with the Bonferroni-Holm method [37]

ISSN: 1745-6673