PubMed Health⌕ Search

Biomedical subjects

P N Saha

Publications and source records attributed to P N Saha.

7 recordsLinked to original sources
PubMed1998

Occupational workload of fisherwomen in India.

A group of 60 fisherwomen, aged 20 to 50 yrs., were studied to evaluate their occupational workloads. Of the eight activities involved in fish handling, only four, viz., sorting, washing, drying, and selling, which are most frequently carried out by the fisherwomen, were selected. The heart rate responses and rating of perceived exertion (RPE) were used as measures of occupational workload. Based on the findings, the occupational workload could be classified as "moderately heavy". A significant influence of age and body weight on the physiological workload was observed, being negatively correlated with age and positively with weight.

Adult↗
PubMed1995

Aerobic capacity of urban women homemakers in Bombay.

Twenty-six healthy women homemakers residing in the metropolitan city of Bombay were studied on a treadmill and a cycle ergometer to determine their aerobic capacity (VO2 max) with a view to evaluating their cardio-respiratory fitness and ascertaining the job-demand-fitness-compatibility in household activities. The VO2 max was found to be significantly higher in treadmill experiments, i.e. 15% in absolute value and 18% in relative value, as compared with that obtained by cycle ergometry (p < 0.001). A much higher difference was observed in values derived from the two methods on the same subjects (i.e. 28% in absolute value and 31% in relative value). Thus, the VO2 max obtained from treadmill experiments may be regarded as the maximal aerobic power or the highest oxygen uptake that an individual can attain during exercise, which in the sample of the present study was recorded as 1.90 l min-1 (33.9 ml kg-1 min-1). The findings also revealed that age and body weight have a direct influence on VO2 max, which was found to be significantly correlated, positively with the latter and negatively with the former (p < 0.01 in both cases). The physiological job-demand of household activities seems to be compatible in relation to the VO2 max of the homemakers.

Adult↗
PubMed1994

A rapid appraisal of occupational workload from a modified scale of perceived exertion.

A simple and rapid method of determining occupational workload among Indian women performing manual activities was developed based on the strong relationship between physiological responses and subjective feeling of exertion. A modified five point scale of perceived exertion, sequentially numbered 1 to 5, was created to simplify the complicated and time-consuming procedures using conventional methods of measuring energy expenditure, or even heart rate responses, during work of very short duration, especially in field situations. The scale denotes physiological workload: 1: very light; 2: light; 3: moderately heavy; 4: heavy; and 5: very heavy. A job-classification table based on energy expenditure and heart rate responses is also proposed, and different household activities such as grinding masalas, dish washing, sweeping, mopping, ironing, storing water, etc. have been graded accordingly.

Adult↗
PubMed1993

HP, GC and PI polymorphisms in sixteen central Indian tribal populations.

HP, GC and PI polymorphisms have been typed on 16 Central Indian tribal populations with a total of 1658 individuals. The distribution of allele frequencies shows a statistically highly significant heterogeneity, which may be caused by several microevolutionary factors, such as genetic drift, social and geographic isolation. Some new variants were observed in both the GC system (GC 2Cmah) and in the PI system (PI Yori). The PI variants are more frequent and are found in most of the 16 populations under study whereas the GC variants are rather infrequent and restricted to only three populations.

Alleles↗
PubMed1975

Aerobic capacity of dock workers in Bombay.

The aerobic capacity (VO2max) of 61 healthy loaders from Bombay Docks actively engaged in heavy manual work of lifting and carrying of food grains bags was estimated by an extrapolation technique based on linear relationship between heart rate and oxygen uptake at different levels of physical work. The average VO2max was found to be 2572 plus or minus 54 ml (S.E.)/min.(STPD) or 46.6 plus or minus 0.96 (S.E.) ml.min.-1 kg-1 (STPD) which is high in many cases when compared to the values reported by other Indian workers among different occupational groups. The possible reasons are discussed. The results further reveal that the VO2max is negatively correlated with age and that this relationship is more pronounced with subjects, aged 31-49 years. The gradual fall in aerobic capacity was observed beyond 33 years of age.

Adult↗