Would you give some examples of bonds that you're talking about (rather than bond funds)? I'm thinking you mean something from Treasury Direct: Treasury bonds (T-bonds), Treasury Inflation-Protected Securities (TIPS) and/or I bonds.
https://www.nerdwallet.com/article/investing/how-to-buy-bonds
see War Made Invisible: How America Hides the Human Toll of Its Military Machine by Norman Solomon
A sister article in The Guardian highlights the two major waves of age-related changes at around ages 44 years and again at 60 years. The findings could explain why spikes in certain health issues including musculoskeletal problems and cardiovascular disease occur at certain ages.
'Sisters and brothers' rock!