For example, it is normal in a recovering or expanding economy for the labor force participation rate to rise as people enter the work force to take advantage of the job opportunities.  During the decade of the long recovery, from June 2009 through May 2019, the labor force participation rate consistently fell from 65.7 to 62.8 percent.  https://www.bls.gov/charts/employment-situation/civilian-labor-force-participation-rate.htm

Another characteristic of a long expansion is high and rising business investment. However, American corporations have used their profits not for expansion, but to reduce their market capitalization by buying back their stock.  Moreover, many have gone further and borrowed money in order to repurchase their shares, thus indebting their companies as they reduced their capitalization!  That boards, executives, and shareholders chose to loot their own companies indicates that the executives and owners do not perceive an economy that warrants new investment.