sentence2_structure: Smoking<>tobaccowould most likely have<>a negative impact on the ability of an individual$$$it<>decreases<>stamina and cardiovascular efficiency
sentence1: There is a great deal of concern that managed care will have a negative impact on the ability of specialty societies to support their educational activities because of greater pressures on practicing Orthopaedic surgeons to be more productive, but with an expected decrease in revenue.
sentence2: Smoking tobaccowould  most likely have a negative impact on the ability of an individual to succeed at physical activities because it it decreases stamina and cardiovascular efficiency.
question: How would smoking tobacco most likely have a negative impact on the ability of an individual to succeed at physical activities?