. .A' v. A' „A-A- - - - ^-^ - - / .& J, A V ' / 'A' - j If — _A -o Obese rats (423 days*) — A- -a Long-lived 1 rats (623 day 1 s* Obese rats (553 days*) ~ a—a Long-lived rats (812 days* I I I U 0 150 300 450 600 0 150 300 450 600 DAYS DAYS * AVERAGE ACE AT DEATH Figure 6.—Comparison of growth curves of obese rats fed SP 8 HVO and SPE diets with those of long-lived rats fed the same diets. diets are all for rats weighing 600 grams or more by 200 days. Of the 18 rapidly growing rats fed these three diets, 8 were dead before reaching 400 days of age; only 1 survived 600 days (603 days on SPB
. .A' v. A' „A-A- - - - ^-^ - - / .& J, A V ' / 'A' - j If — _A -o Obese rats (423 days*) — A- -a Long-lived 1 rats (623 day 1 s* Obese rats (553 days*) ~ a—a Long-lived rats (812 days* I I I U 0 150 300 450 600 0 150 300 450 600 DAYS DAYS * AVERAGE ACE AT DEATH Figure 6.—Comparison of growth curves of obese rats fed SP 8 HVO and SPE diets with those of long-lived rats fed the same diets. diets are all for rats weighing 600 grams or more by 200 days. Of the 18 rapidly growing rats fed these three diets, 8 were dead before reaching 400 days of age; only 1 survived 600 days (603 days on SPB diet). The rats that were still maintaining their weight at 600 days of age grew slowly on all three diets and survived approxi- mately 300 days longer than did the rapidly growing rats fed the corresponding diet. The slowly growing rats tended to reach maximum weights comparable to those attained by the rapidly growing rats but at a much older age. No data were available from this study to indicate the possible advantage of restricting food 721-631—64- intake to prevent the excessive weight gain of the older rats fed these diets. The tendency for rats to become heavy at an early age when fed SPM and SPPB diets may be a factor in the relatively large number of early deaths on these diets. Al- though a rapid gain in weight was generally asso- ciated with a short lifespan, a slow rate of early gain did not necessarily result in a long, healthy life. The results with other experimental diets show a similar trend for rapid early growth to be associated with early death, but are too few to permit their separation as has been done for the diets just discussed. The tendency to a shortened 27
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Keywords: ., bookcentury1900, bookpubli, booksubjectdiet, booksubjectnutrition
