One study examined the physical health of mothers who volunteered over 30 years and found that 52% of those who did not belong to a volunteer organization experienced a major illness while only 36% of those who did volunteer experienced one.
wˈʌn stˈʌdi ɛɡzˈæmɪnd ðə fˈɪzɪkəl hˈɛlθ ʌv mˈʌðɚz hˌuː vˌɑːləntˈɪɹd ˌoʊvɚ θˈɜːɾi jˈɪɹz ænd fˈaʊnd ðæt fˈɪfti tˈuː pɚsˈɛnt ʌv ðoʊz hˌuː dɪdnˌɑːt bᵻlˈɔŋ tʊ ɐ vˌɑːləntˈɪɹ ˌɔːɹɡɐnᵻzˈeɪʃən ɛkspˈiəɹɪənst ɐ mˈeɪdʒɚɹ ˈɪlnəs wˌaɪl ˈoʊnli θˈɜːɾi sˈɪks pɚsˈɛnt ʌv ðoʊz hˌuː dˈɪd vˌɑːləntˈɪɹ ɛkspˈiəɹɪənst wˌʌn.