Fig. 2
The individual measurements of \({\mathrm{RHR}}_{\mathrm{shift}}\;\mathrm{and}\;{\mathrm{RHR}}_{\mathrm C},\;{\mathrm{RAS}}_{\mathrm{shift}},\;{\mathrm{RAS}}_{\mathrm C},\;{\overset.{\mathrm V}\mathrm O}_{2,\mathrm{shift}}{\overset.{\mathrm V}\mathrm O}_{2,\mathrm C}\) in relation to the recommended limits for prolonged occupational work according to [17] and \({\dot{\mathrm{V}}\mathrm{O}}_{2,VT1}\)
\({RHR}_{shift}\) Individual mean relative heart rate (RHR) during Tshift, RHRshift,rec The calculated maximum recommended RHR for Tshift [17], RHRC Individual RHR during TC, RHRC,rec The calculated maximum recommended RHR for TC [17], RASshift Individual mean relative aerobic strain (RAS) during Tshift, RASshift,rec The calculated maximum recommended RAS for Tshift [17], RASC Individual RAS during TC, RASC,rec The calculated maximum recommended RAS for TC [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), \({\overset.VO}_{2,C}\) 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 Tshift (TC)