Final answer:
Following a 12-week aerobic conditioning program, an individual would be expected to have lower circulating blood lactate levels at submaximal workloads compared to before the program.
Step-by-step explanation:
Following a 12-week aerobic conditioning program, an individual running at submaximal workloads would be expected to have lower circulating blood lactate levels as compared to the value obtained at that same absolute workload prior to the conditioning program.
During aerobic exercise, the body becomes more efficient at utilizing oxygen and producing energy through oxidative metabolism. This reduces the reliance on anaerobic glycolysis, which produces lactate as a by-product. Therefore, after the conditioning program, the individual's muscles will be able to sustain submaximal workloads without accumulating high levels of lactate.