1. Obesity Rates
- 1975: Approximately 15% of U.S. adults were classified as obese.
- Today: Over 42% of U.S. adults are classified as obese (2020 CDC data).
Implication: There has been a dramatic increase in obesity, linked to dietary changes, sedentary lifestyles, and larger portion sizes.
2. Life Expectancy
- 1975: Life expectancy in the U.S. was approximately 72.6 years.
- Today: Life expectancy is around 76.4 years (2023 CDC estimate), though it has fluctuated due to factors like the COVID-19 pandemic.
Implication: While life expectancy improved for several decades, recent trends show a plateau or decline due to issues such as chronic diseases, drug overdoses, and other public health challenges.
3. Physical Activity
- 1975: A higher proportion of Americans were engaged in physically active occupations, and fewer had sedentary jobs.
- Today: Over 80% of jobs are considered sedentary or require low physical activity, contributing to lower daily energy expenditure.
Implication: The shift to more sedentary lifestyles has significant health consequences, including increased risks for heart disease and diabetes.
4. Diet and Nutrition
- 1975: The average diet included fewer ultra-processed foods and sugary beverages, but higher rates of smoking were observed.
- Today: The typical American diet includes a higher percentage of calories from processed foods and added sugars, contributing to metabolic disorders.
Implication: Diet quality has worsened in many respects, despite increased awareness of nutrition.
5. Smoking and Substance Use
- 1975: About 40% of U.S. adults smoked cigarettes.
- Today: Smoking rates have decreased to around 12.5% (2023 estimate), but issues like vaping, opioid use, and alcohol consumption have increased.
Implication: Public health campaigns against smoking have been successful, but new challenges in substance abuse have emerged.
6. Chronic Diseases
- 1975: Rates of chronic diseases like diabetes and heart disease were lower.
- Today: Prevalence of type 2 diabetes has more than tripled, affecting over 11% of adults.
Implication: Chronic disease rates are higher today, correlating with lifestyle and dietary changes.
7. Mental Health
- 1975: Mental health awareness was limited, with fewer diagnoses and less treatment.
- Today: Mental health conditions like anxiety and depression are more widely recognized, but rates of these conditions are higher, partially due to increased awareness and modern stressors.
Implication: Mental health care access has improved, but challenges persist with rising rates of mental health issues.
Now back to a human being: Overall, it seems like a mix: people are much fatter but still live a few years longer, probably thanks to more sophisticated medical interventions. So lifespan is longer but that doesn't mean that health-span is longer. We're much less active generally, and that's a huge problem. We smoke much less, which is great, but deaths due to drug abuse, particularly opioids, have risen dramatically.
We write and talk much more about nutrition and what's in food, but still eat far more that is bad for us. Type 2 diabetes has dramatically increased doe to the lack of physical activity and poor diets. More people are diagnosed with mental health issues, but its very difficult to know if that's because those issues have actually increased or just because people are more willing to recognize them.