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Gnaiger 2023 MiP2023
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Link: MiP2023 Obergurgl AT
Gnaiger Erich (2023)
Event: MiP2023 Obergurgl AT
‘Obesity is a complex condition, one with serious social and psychological dimensions, that affects virtually all age and socioeconomic groups and threatens to overwhelm both developed and developing countries’ ― the WHO perspective on ‘globesity’ (https://www.who.int/activities/controlling-the-global-obesity-epidemic). Obesity defined as BMI≥30 (WHO) is biased, overestimating obesity thresholds in taller persons (men) but underestimating it in smaller groups (women) ― a gender data gap. Here obesity is defined as accumulation of excess fat-tissue mass, MFE=MF-MF°. MF° is the fat mass per individual in the healthy reference population at any height and body mass M° without overweight. Body fat excess, BFE=MFE/M°, is related to body mass excess, BME=ME/M°, where ME=M-M°. A balanced BME is BME° = 0.0 with a band width of -0.1 towards underweight and +0.2 towards pre-obesity (overweight). The BME is linearly related to the body fat excess in women and men with statistical implications on mitochondrial functional fitness.
Aerobic spiroergometric capacity per body mass VO2max/M and mitochondrial respiratory capacity per muscle mass [1] decline as a function of BME. Compromised mitochondrial fitness across metabolically active organs provides a functional connection between obesity and comorbidities bound to redox imbalance, inflammation, oxidative stress, and insulin resistance: diabetes, cardiovascular and neurodegenerative diseases, various types of cancer (Figure 1). mitObesity is the leading cause of deaths and early aging, prevented by improved quality of life in active lifestyles with exercise and caloric balance.
Obesity has reached the general news, without connection to mitochondria. How do we get from globesity to mitObesity to forge scientific results into knowledge impacting society, health system stakeholders, and politics?
• Keywords: obesity, healthy reference population, body mass excess, body mass index, mitochondrial fitness, degenerative diseases
Labels: MiParea: Respiration, Exercise physiology;nutrition;life style, mt-Medicine, mt-Awareness Pathology: Obesity
Organism: Human Tissue;cell: Skeletal muscle
Coupling state: OXPHOS
Event: Oral
Affiliations
- Gnaiger E
- Oroboros Instruments, Innsbruck, Austria - [email protected]
Reference
- Gnaiger E (2009) Capacity of oxidative phosphorylation in human skeletal muscle. New perspectives of mitochondrial physiology. https://doi.org/10.1016/j.biocel.2009.03.013
